How can you adjust the column width on cube views?

Answer

For the Row Header width: This can be found under General Settings > Header Size, and can be either set to a specific width, or –1 for default sizing. Needs to be set independently for Data Explorer, Excel & Report modes.
For the Column width: This can be set for the Data Explorer, Excel & Report modes individually and can be set in the Default 'Header Format' for the CV, or specific columns. The three setting names are shown below:

 

Source: Office Hours 2020-03-26 Partner Enablement