disappear all windows in my pannel

[faustf]

hi ihave open many app browser and other but all is desappear from my panel how is possible to restore ?

[1000]

Nothing disappears without a cause

- It may disappear due to an error.
You can reset your computer / desktop environment or logout and login to Mate.
Errors should be found in system logs and reported to the appropriate place.
https://linuxmint-troubleshooting-guide ... where.html

- You may have accidentally deleted it
You can add new applet.
Right click on taskbar at the top ( to a specific place ) --> "+Add to panel"
--> Select / choose "window list" --> Click "+Add" button.

Removal is sometimes harder.
- Or you right-click on item --> "-Remove from panel"
- Or on the left side there is a very thin stripe, you have to hit it with the right mouse button,
then option "-Remove from panel" will be visible.
- If this option is greyed out, then you have click option below "Lock on panel"
This option prevents accidental deletion.