I have seen this issue touched upon in other threads but I have just raised the issue with Fujifilm so thought it would be good to create a specific post.
Please see the below description, if this effects your use of the X-H2S please add to the comments and I will forward all comments to Fuji.
Issue Description
When shooting in ‘Manual Mode’ it is not possible to assign ISO and SS to the rear or front command wheels. This can be done on the XT3, XT4 and GFX100.
The only options for the command dials on the X-H2S are Aperture and Shutter Speed. They do not include ISO.
The options are identical for both ‘Manual Mode’ and ‘C1-C7 Manual Modes’
Firmware Change Request
1) Add the ability to assign ISO, Aperture, SS and Exp Comp to both the front and rear command dials when in Manual mode (Priority - Must have requirement).
2) Allow point 1) to be configured for manual mode independently within C1-C7. (Priority - Should Have requirement).
Work Around
The work round is to select the ISO button and use the rear wheel, but this removes all information from the EVF / LCD apart from the ISO selection. Importantly the ‘exposure indicator’ is not viewable, meaning the correct ISO must be guessed or calculated before selecting the ISO button.
Issue Impact
When shooting fully manual in fast moving workflows, shots will be repeatedly missed or incorrectly exposed due requiring multiple guesses to get the correct ISO / Exposure for the selected SS and Aperture.