By default, Adobe InDesign CC displays the Rectangle Frame Tool and the Rectangle Shape Tool in the Toolbox, which is typically located on the left side of the workspace. These tools have a drop-down menu indicated by a small arrow in the lower-right corner of the tool. To access these additional tools, click the mouse button until the drop-down menu appears, and then select the desired tool.
How to Create Custom Frame Shapes in Adobe InDesign | Cadillac Cartoonz
The tools work the same way, but draw different shapes. Don't confuse the frame tools with the Rectangle, Ellipse, and Polygon shape tools. The frame tools create boxes (or frames) for graphics. The Rectangle, Ellipse, and Polygon tools draw shapes to fill or outline with color.
To use one of the frame tools, select the Frame tool from the toolbox, select an empty space in the workspace, and drag the pointer to draw the shape.
Holding down Shift while dragging constrains the Frame tool in the following ways:
