Setting output dimensions?

[hansm]

I encounter difficulties in setting the output size in HDR8 Studio. Probably I misunderstand the settings pane.
Goal: 36x24mm KB negative scanned, desired output picture of height 1080 pixels to fit on HD television screen.
But whatever I enter in the (expert) fields for output, my 1080 height pixels are constantly changed in something else and not into the values wanted.

With settings showing:
Format: Custom
Preset Custom (3600dpi) - scanned at that resolution
Situation as shown:
Input Zoom Output
35.13 100 35.13
21.68 100 21.68
When I trie to enter 1080 pixels in the height output field the typing is not accepted, the Preset popup changing, for me, unpredictably.

I would appreciate if someone can hint at the error(s) I am making.

[LSI_Ketelhohn]

Dear customer,

to change the actual size of your image please open the lock behind the dpi slider.
The note in front of it will change from "Out" to "In".
Now you can change the output size.

Bildschirmfoto 2013-10-25 um 16.56.45.png (34.86 KiB) Viewed 956 times

Kind regards,
Arne Ketelhohn