@Aleksi_Alkio In my case I am unable to choose a category option beyond the two choices “auto” and “none”. The screen shot I took was unable to capture that condition for you because upon clicking to activate the Snippet application, the selected Category dropdown disappeared.
That said, ‘auto’ and ‘none’ are the only two choices available for Category - even though I do have a text column called “Category”, which does appear in all of the other column designations - including ‘Start’ and ‘End’ times/dates as well as the other text field, ‘Description’.
Looking at my table, ‘Category’ is its last column and it had no data. I therefore populated that column with fake data for every record and then regenerated the table in AppSheet hoping that this would make the ‘Category’ column available to AppSheet for designation as ‘Category’ in Calendar View. Unfortunately, I still only have the two choices ‘auto’ and ‘none’ and cannot see any data in Calendar view even though I can in any other view.
The last thing I tried was to go ahead and select ‘auto’ as the ‘Category’ column designee. This is in fact the way it was before (as one would expect: ‘auto’ is selected by default). I wanted to be sure however, that there would be no difference in forcibly selecting the option from simply allowing its selection by default. I therefore selected ‘none’ first and then saved my changes. I then re-selected ‘auto’ and save my changes - again to no avail. I simply cannot choose any option other than either ‘none’ or ‘auto’ for the category column and still cannot see any data in the calendar view.