"Applied" changes modify the original
copy or add a new entry to the selection list, so are
persistent until leaving or reloading this page.
When tweaking font sizes it is advised that if the text is
a "perfect fit," that you select instead select one
font size smaller than the optimal fit! The reasons are that (A) Chrome often
renders fonts a tick larger than Firefox and (B) Firefox sometimes renders fonts
a tick larger when printing. Both situations can lead to truncated text even when
the on-screen text looks okay in one browser or the other.
Pro tip: to add/edit many cards at once, paste an
array of card objects into the "Raw JSON" field and tap
the "Inject" button. The whole list will be added/updated and the
first entry from the list will be selected. This can be used for offline
editing of multiple cards.