Basically, Chord Sheet Maker Online offers three options for transposing.
These are on-the-fly, a fixed standard transpose and changing the original source.
To perform a transpose on the fly, you will find a toolbar button on the chart preview page.
But the app doesn't know anything about musical keys.
It just shifts the chords by the number of semitones you select in the drop-down list.
So you have to find the right key yourself.
If you are transposing down you might get flats (♭), and if you are going up you might get sharps (♯).
In the advanced edit form you can set a value for a fixed standard transpose.
The original source is NOT changed.
Below the simple edit form you you can expand a hidden tidy & transpose button.
This is particularly useful when you want to create different variations of the same charts.
Imagine a series of songs that could have different keys to play with capos and brass.
If you play in more than one band, you may play some songs in different keys.
Or you could create a compilation with all the charts in the Nashville Number System.
To also transpose the name of the key in section titles and annotations, you must include them with square brackets [ ].
See this example in the features section.
Take a look at the user preferences regarding the Musical note B - variation by geographical region.