PDF Reader starting not correct- missing programm close icon

Hi there

Hope you are doing well and sorry for the trouble. As described,  When opening a pdf document, the top bar is no longer there

Please try to reboot the computer once and see if that helps. Also, please check for any missing/pending update for computer OS and try updating it.

If it still doesn't work, please try to reset the Acrobat preferences to default as described in the help page https://community.adobe.com/t5/acrobat/how-to-reset-acrobat-preference-settings-to-default/td-p/4792082 and see if that works.

If it still doesn't work, please create a new test user profile with full admin rights or enable the root account in Mac and try using the application there and check .

Regards

Amal