In order to allow your symbols resize according to its content, make sure that you enable this feature as shown here:
No more Whack-a-Mole. Make your buttons dynamic by using Padding.
Padding makes your buttons resize themselves magically based on their content. No more playing whack-a-mole with dozens of buttons that have to be resized each on its own. Simply set Padding once, and Anima will take care of the rest.
Learn more about Padding.