How do I disable ALT+TAB preview windows in Cinnamon?
See this the screenshot, to see what I mean.
1) Right click in cinnamon panel > settings > all settings
2) In the settings settings window, click in Switch to Advance Mode.
3) Got to Preferences and click in Windows
4) Go to "Alta-tab switcher style" and Choose your favorite option: eg (icon only, icon and window preview etc)
NOTE: by default the option is in "icons and thumbnails". So you can choose "icons only".