for looking at this issue.
At the time of posting I thought the described problem would be very consistent.
I tested different version of FIJI, plain ImageJ and also FIJI from development environment.
The problem occurs only in the installation FIJI 2.0.0-rc-69/1.52u39 even after shut down and restart (100% sure).
My test image was a simple 8bit image 200x200 created with ‘New Image’ menu function.
(I don’t think that the problem is image-specific.)
Today I have tried to reproduce the situation (with the FIJI/ImageJ 2.0.0-rc-69/1.52u39 and with a new fresh FIJI installation before and after updating to IJ Nightly Build).
This time it took some time to force the proble to turn up (in FIJI 2.0.0-rc-69/1.52u39).
And this time it disappears after shut down and restart of FIJI.
It is unclear what is different this time.
And unfortunately I can not give a clear instruction to enforce it.
Today I used on 8bit image 1000x1000 created with ‘New Image’. (beside the 200x200 image)
I created PolygonRois and FreehandRoi, on different zoom levels, added them to the RoiManager, closed the RoiManager, created some more PolygonRois starting from low zoom levels and … suddenly … on higher zoom levels when only a part of the image is displayed … the cursor is shifted.
I tried this several times and forced the problem - sometimes more quickly and sometimes it took a while.
I am not sure what the critical action is.
In ImageJ 1.52v5 or FIJI/ImageJ 2.0.0-rc-69/1.52v5
it is easy to see a similar (but not identical) effect when starting to draw a PolygonRoi at low zoom levels and increasing the zoom level while the polygon is not finalized.
The difference to the descibed problem is that the effect disappears when a new polygon is started.
Maybe we can start investigating this temporary effect.
I think @Wayne should be informed.