Custom Action Name is not visible in Screen layout
SummaryCustom Action Name is not visible in Book New Activity Screen layout
I have created an Action Name as shown in the attached screenshot and associated the Action Name as button into Book Activity Screen in the Version 18D. But after the instance upgrade to 19A, i was not able to see the custom button on Book Activity Screen and also i was not able to find the Actions Tab in Screen Layout to add it again. Please find the two screenshots (Action Screen & Book Activity Screen Layout) attached for your reference.