How to View Previews

Did the Windows File Explorer suddenly stop showing previews of photos, videos and PDF documents? In their place generic icons appear and you don't know how to solve the problem? Would you like to enable previewing for files, such as MKV and FLV videos, which are not normally supported by the Windows or macOS file manager? No problem, today I'm here to help you solve this kind of problem!

If you give me five minutes of your free time, I can explain how to view previews on Windows and macOS by acting on the settings of File Explorer and Finder (the file managers of the two operating systems) and, if you are interested in this, I can explain how to activate previews for those types of files that are not normally supported, such as for example the aforementioned videos in MKV or FLV format.

So, what are you waiting for to start? Make yourself comfortable, carefully follow the instructions below and try to put them into practice. I assure you that, in no time at all, you will be able to activate previews for all the types of files you want and solve any problems related to their display in the File Explorer and in the Finder. Happy reading and have fun!

View Previews on Windows

Be vuoi scoprire how to view previews in 'File Explorer di Windows, take a few minutes of free time and follow the instructions you find below. I assure you that you will be able to solve all your problems related to viewing previews in Microsoft's file manager.

Enable Previews in File Explorer

If you are no longer able to view file previews in File Explorer and simple icons appear in their place, proceed as follows: open any folder, click the button Fillet collocato in alto a sinistra and selects the voice Change folder and search options give the menu check if you press.

At this point, select the tab viewing of the window that opened, remove the check mark from the option Always show icons, never previews and click on the buttons Apply e OK to save the changes. If you are using a version of Windows earlier than 8.x, to reach the same settings you have to open any folder and then select the item Folder options from the menu Means (up).

Within a few seconds, the Windows File Explorer should return to showing previews again instead of icons (for supported files). I remind you that the display of previews is not available if in the menu View in the File Explorer a view mode is activated between List, Details e Small icons. To have the previews of the files with these display modes active, you have to call up the previews panel of the File Explorer by clicking on the button Preview pane located at the top left of the tab View (will still show only the previews of the files selected with the mouse or keyboard at that moment).

If after turning off the "Always show icons, never previews" option you still don't see file previews in the File Explorer, try restarting the Windows file manager and clearing the preview cache files.

  • To restart the File Explorer, right click on the taskbar (the one at the bottom of the screen) and select the item Activity management from the menu that appears. In the window that opens, if necessary, click on the item More details to view the list of all processes running on the PC, then go to the tab Processes, select Windows Explorer and click on the button Restart located at the bottom right.

  • To clear the preview cache files, click the button Start (the flag icon located in the lower left corner of the screen), search "cleaning disk" in the menu that opens and select the utility icon Cleaning disk from the search results. In the window that opens, put the check mark next to the item Previewclick on your button OK And that's it.

View Previews of Unsupported Files

Would you like to view previews for files that are not natively supported by the Windows File Explorer, such as MKV or FLV videos? No problem: by installing third-party software, you can expand the potential of the Windows file manager and get previews even for those file formats that are not normally supported.

Going into more detail, you can get previews for all major video file formats by installing ADVANCED Codecs by Shark007- A free video codec pack that adds support for all major video file formats to Windows Media Player and, consequently, to the Microsoft operating system File Explorer.

To download Shark007 ADVANCED Codecs on your PC, connect to this page of the MajorGeeks website and click on one of the links [email protected] present in it. When the download is complete, open the file by double clicking on it ADVANCED_Codecs_vxx.exe, just downloaded and click on the button first Yes and then OK e forward.

Then place the check mark next to the item I accept the terms of the license agreement and finish the setup by first clicking on forward three consecutive times and then on Install e end.

Mission accomplished! Now open the File Explorer and you should also find previews for those video file formats (eg. AVI, MKV and FLV) that were previously not supported by Microsoft's file manager.

If you have second thoughts, you can remove previews for video files from the Windows File Explorer by simply uninstalling Shark007's ADVANCED Codecs from the Windows Control Panel (following the standard procedure for uninstalling programs). If you are not very familiar with the PC and do not know how to uninstall a program, please read the tutorial I dedicated to the subject.

View Previews on Mac

I use a Poppy and are unable to view previews of files in the Finder anymore? Would you like to view previews for files, such as videos in AVI format or archives in ZIP format, which are not normally supported by the macOS file manager? No problem, below you will find explained how to do it.

Enable Previews in Finder

If the Finder has stopped displaying file previews and displays anonymous icons instead, proceed as follows: Open any window of the Finder, go to the menu Vista located at the top and select the item Show view options from the latter.

In the window that opens, put the check mark next to the item Show icon preview which is located at the bottom and the game should be done: instead of the icons, in fact, the Finder should now show you the previews of all the files supported by the Quick Look system, then PDF documents, photos, videos in MP4 format and so on. From the same window, if you want, you can also adjust the size of the icons and the criteria with which to organize them by default.

If you want to see a large preview of the files selected in the Finder, go to the menu Vista (above) and put the check mark next to the option Come Cover Flow: in this way, a box will appear in the upper part of the window, through which to display a large preview of the file selected in the Finder.

Also, I remind you that clicking on a file and then pressing the space bar on the keyboard or, in the case of Macs with a trackpad, by making a deep tap or a three-finger tap on a file, you can preview it through the Quick Look system of macOS.

View Previews of Unsupported Files

If you want to extend the Finder functionality and preview even those file formats that are not normally supported, you need to install QuickLook extensions.

For example, if you want to have a preview for all major video file formats (besides MP4, which macOS natively supports), you can install the plugin QuickLook Video, which is completely free and allows you to preview files in .asf, .avi, .flv, .mkv, .rm, .webm, .wmf and other video formats. It is optimized for macOS 10.9 and later, on macOS 10.8 and earlier it requires Perian to be installed.

To download the QuickLook Video plugin, connect to the Github page that hosts it and click on the first pkg link you find in it (eg. QLVideo_191.pkg). Once the download is complete, open the package pkg that you have downloaded to your computer and, in the window that opens, click on the button first Continue twice in a row and then on Accept, Continue e Install. Then type the password of your user account on macOS (the one you use to access the system) and complete the setup by pressing first on Install software and then Close e Move.

Mission accomplished! From now on, your Mac's Finder should also be able to show you previews for videos in a format other than the classic MP4. If you have second thoughts, to uninstall QuickLookVideo, open the terminal (I puoi trovare nella cartella Other . Launchpad) and give the command sudo rm -rf "/Library/Application Support/QLVideo" "/Library/QuickLook/Video.qlgenerator" "/Library/Spotlight/Video.mdimporter", I follow the pressure of the tasto Submit on the computer keyboard and entering the macOS admin password.

Please note: after installing the plugin, you may notice a small temporary slowdown on your computer due to the indexing of videos that were previously not supported by the Finder.

Would you like to view the contents of ZIP archives without having to extract them first? It can be done: just install the plugin di BetterZip per Quick Look, select the archive to be previewed and recall, precisely, Quick Look, by pressing the space bar on the keyboard or using the appropriate trackpad gesture (tap with three fingers or tap decided, on Macs with Force trackpad Touch).

To download the BetterZip plugin for Quick Look, connect to this web page and click on the link Legacy version 1.5 found under the heading BetterZip Quick Look Generator (legacy versions). When the download is complete, extract the ZIP archive you just downloaded and copy the file BetterZipQL.qlgenerator in the folder /Library/QuickLook/ of your Mac.

If you don't know how to get to the folder /Library/QuickLook/ on your Mac, right-click the Finder icon in the Dock bar and select the item Go to the folder from the menu that appears. Then type in the path /Library/QuickLook/ in the window that opens and give Submit.

To make the plugin active, you need to restart the Quick Look service by opening the terminal and giving the command qlmanage -r.