Defining or changing a button bar
You can define a button bar to display multiple buttons and popover buttons horizontally or vertically. For each button or popover button, you can add a text label, an icon, or text and an icon. For buttons, you can assign a single command or a script to perform.
To define or change a button bar:
See Creating and editing scripts.
In Layout mode, from the Layout pop-up menu, choose the layout for the button bar. Then:
To define a new button bar, in the status toolbar, click the Button Bar tool Button Bar tool, then drag the crosshair to draw the button bar. FileMaker Pro creates a button bar with three segments on the layout and displays the Button Bar Setup dialog box. (You define the segments as buttons or popover buttons.)
By default, FileMaker Pro creates a label of text only, center aligned.
Label text button
Image only button
For Active Segment, choose the segment that will by default be the Active display state in Browse and Find modes.
To have no active segment, choose None. To create a calculation for the active segment, choose Specify. See Working with formulas and functions.
To use a custom icon, click +, choose a filename (in .png or .svg format), then click Open. For more information about SVG support, see FileMaker Pro SVG Grammar for Button Icons.
To remove a custom icon, select the icon, then click . The icons will be removed from the library, but existing buttons that use the deleted icon don't change.
To add a segment to the button bar, click +; to remove a segment, select the segment and click .
Button, choose an action and change the cursor appearance (see steps 5 and 6 of Defining or changing a button). Then continue to step 9, below.
Popover Button, choose the direction in which the popover opens and assign script triggers to the popover (see step 2 of Changing popover settings). Then continue to step 9, below.
To rearrange segments in a button bar:
To move a button bar:
Related topics 
Script steps reference (category list)
Script steps reference (alphabetical list)
Formatting buttons, popover buttons, and popovers
Defining or changing a button