I activated the folder format "Images" and set the content treshold to 75 %.
The issue is, that folders are not counted as content. So if you have in a folder 10 folders and 1 image the folder format "Images" is activated.
Is this intended? Could perhaps a setting be added to count also folders?
I could solve my second issue by myself. The image toolbar was activated due to the toolbar setting "Thumbnails mode" at Preferences / File Display Modes / Toolbars
Somehow overdetermined, because you can also define a toolbar in the folder formats.
Oh. I thought that means the content of subfolders is considered for the calculation. I did not realize the second possible meaning...
I tried to find a description in the help file, but it seems this window is not described in the help file. I also cannot find there something about "treshold".
Searching on threshold (note the spelling) will find the page on Content Types, although it doesn't explicitly mention the Consider subfolders... checkbox.
It was probably added after the docs were written. I'll make a note to update them.
(Considering subfolder contents, rather than the subfolders themselves, would not makes sense. That would mean considering things that aren't visible when deciding how to show the visible items.)
I thought that means the content of subfolders is considered for the calculation. I did not realize the second possible meaning...