Top layer "symbols" on Layer Panel

[Jim Monson]

(Working in aPub v1 since my group is still there.)  There has been much discussion about this on the forum but I have yet to find some explanation for the symbols below on the top layer in aPub. lt must have to do with this question. I have placed many objects within a bounding box on the top layer. Great! But if I want to change the area of the bounding box the object remain "destroyed," i.e., the effect of the original bounding box remain (objects remain clipped as they were before). I realize that they are still there and have found that the only way to see the original unclipped object is to create a new top layer and move all of the object into that new top layer. Thus it appears that the original clipping is preserved in this original top layer.

I see the symbols (attached snap) in this original top layer. These no doubt are related to the above. However, I have yet to find some aPub video that explains these layer symbols. Does one exist? BTW, by "symbol" I simply mean those which appear in the snap below (click to see full snap. NOTE that the == is part of my panel name. My question is about the symbols to the left of the ==.  Nothing to do with creating "symbols" in aPub.

[prophet]

That box is a thumbnail preview of the Layer contents. Can you show us your whole workspace with that Layer selected so we can see what's going on?

[Pšenda]

4 hours ago, prophet said:

Can you show us your whole workspace with that Layer selected so we can see what's going on?

From the description,

4 hours ago, Jim Monson said:

click to see full snap

I gather that something other than what was intended was inserted - clicking on the inserted image will not show anything else.