I am still learning how to use QGIS: I am making a map of a location in Antarctica, so I am using WGS 84/Antarctic Polar Stereographic coordinates (EPSG:3031). I have put the map into a print layout and added a frame to it, but I need to add coordinates to the frame in decimal degrees (i.e. "72.98°S"). When I examine the "Draw Coordinates" section of the "Item Properties" tab, the "Format" dropdown menu offers "Decimal", "Decimal with Suffix", and "Custom" options.
Is "Custom" what I need to use for this?
If so, can you please explain for me how to use it to convert my coordinates into a lat/long format, or point me towards a guide/documentation on how to do so?
In response to the answer which suggested I change the "Format" of the frame to "Degree, Minute with Suffix", please see here a screenshot of my "Item Properties" panel.
Do you know why I only get the three options shown here?