Created attachment 93178 [details]
2 screen shots plus example file
Depend from the content of the open document and the position of the cursor in it the zoom tool in the bottom right corner of the main window is moving him self and get partly visible.
This behaviour is available in all 4.1.x versions plus also in the last Libre Office version: 18.104.22.168 Build ID: 05dceb5d363845f2cf968344d7adab8dcfb2ba7
This is annoying and makes difficult to zoom the document representation in some cases.
Please see the attached ZIP file. There in it are 2 screen shots taken when the zoom tool get moved and partly visible. Please see the red arrows showing it.
Also there is included a document to open and see this behaviour.
To reproduce it please open the document and start move the cursor down row by row monitoring the right down part of the Libre Office Writer window.
Known problem : bug 42894
*** This bug has been marked as a duplicate of bug 42894 ***