You can scroll through the shapes library, select a category on the left, or search to find the one you want to use. You can also use the Pen tool or
Change the type of connection line: straight, cornered, or curved. (Available when you add a connection line between two items.)
To add text to a shape, select it, then start typing.
To apply formatting to specific text in a shape, select the text, then use the formatting buttons for the item.
To change a shape you added to a board, choose Format > Shapes and Lines > Change Shape (or Control-click the shape, then choose Change Shape).
After you add a shape to a board, you can customize the shape in a number of ways. For example, you can change the standard five-point star into a twenty-point starburst and adjust how rounded the corners of a square are.
To make a shape or line editable, choose Format > Shapes and Lines > Make Editable. After you make a shape or line editable, you can use the handles to change the line from curved to straight or add more handles for more variations.
You can use connector lines between a shape and other items. If necessary, click the Show Connectors button diagrams, Lock an item on a Freeform board on Mac