How to use: PC: E to show/hide bar Mobile: Show/Hide button to show/hide bar Both: Grey circle with white text shows the size Variable on the bottom does the same but shows the custom size amount Draw/Erase button switches the mode to erase or draw Long grey shows the size Circle with C text modifies the size into a custom size (prompt shows up to tells you to type in the size) Big square with X clears the drawing (prompt shows up to confirm)
you can use π and e, they're supported irrational numbers when setting a custom size