I can't see the whole interface of the panel, it looks like it's too big for its window!

This is likely due to a bug that is present between Photoshop and Windows since version CC 2019 and it may resurface from time to time depending on the peripherals like the display used or after some Windows or Photoshop update.

Since, unfortunately, it does not depend directly on the panel itself and, more importantly, is not an easily reproducible bug there is no one-size-fits-all solution for it, but over time we have collected a variety of information that can hopefully help with a resolution of the problem.

Some of our users who were experiencing anomalies in the scaling of the interface within the panel have seen an improvement by going to the compatibility parameters (which change the way the app is treated by Windows in relation to certain features)

Go to the folder Program Files > Adobe > Adobe Photoshop 2024 (or any other version you have installed), then look for the Photoshop.exe file and right click on it and select the Properties item, this window will open.

(sometimes, when right-clicking directly on the file without selecting it with a left click, the contextual menu that appears will be for the folder and not the app, so please make sure the checkmark close to the app icon is there if you see that the window is not like the one here above)

Our research shows that this bug is mostly about Windows trying to “fix" the transition of the app to high-resolution screens by itself, which manages to break the scaling in the process, and there are two ways to try and fix that (one of the problem of this bug is that is extremely variable ion behaviour, probably because Windows machines deal with a LOT of different types and makes of hardware):

1. Click on Change high DPI settings and try playing with the options inside the new window that opens (please remember that after selecting an option and clicking Apply you will need to restart Photoshop to see if the change had any effect. Both the Program DPI settings and High DPI scaling override did have some positive results.

2. Enable the Compatibility mode checkbox and select Windows 8. Again, you will have to restart Photoshop if it was open.

This second one the is the one that had more success at the moment, as it’s effectively removing all the High DPI “enhancements” that really create the problem.