thanks for feedback.
display setting does not seem to be the issue. I tried various percentages; with that on my 4k monitor the various windows just change their size on screen, but the Avast-firewall pop-up window itself, not matter at which screen setting, does not change its content/amount of information.
Only the first few letters of the path (of the calling program), the local address, the remote address are displayed because it is too small a window which I cannot resize.
And, sorry, I seem to be incapable of providing the screenshot - the "Insert Image" button for the post just gives me the "

" text, and I find not way to provide an image for a post.