You first have to select the tab control you want to edit as you could have multiple tab controls on your layout and FileMaker wouldn't know which one to edit if you don't tell it by selecting that control before making this menu selection.
I do not want to edit the tab, I want to create a new tab. The directions tell me to select a tab and then go to the format menu, so on and so forth.
Thank you for your posts.
To create a new Tab Control, go into Layout Mode, and with the Status Toolbar displayed, click the Tab Control tool. Then, on your layout, draw the tab control on the layout where you want it to appear. Once the tab control is drawn and you let go of the mouse, the Tab Control Setup window will appear to make the desired adjustments.
Let me know if you need additional clarification.