I'm practising using the schematic entry in the post editor.
When switching between Firefox 107.0.1 (64-Bit) tabs and windows, the schematic entry disappears time and again, apparently when I click "in the post editor", but outside the schematic entry.
(Sometimes, this is the only way I find to get to continue editing the post body: Trying to leave schematic entry doesn't work, neither from its file menu's close entry, nor hitting the x in the upper right corner of the frame.)
Hitting the Schematic button in the toolbar again starts an empty one:
How do I get back to what I already entered?
Zooming out to the max doesn't show the plug-in(?).
In Opera 30.0, the tool-bar doesn't show, I don't even get to start schematic entry.