Type Slider

move the slider to choose a text character.

click Add → or ← Add to add the character to the text box.

in the options, you can change the slider's min and max values,
to narrow or broaden the range of available characters.

or select a block of characters from the drop-down to use just that block.

you can also change the slider width or the font size.

optionally, you can take screenshots or use a screen recorder if you want to record video or make gifs.