Sorry.  I didn't intend to sound mean about the stuff already done here.  I was just amused that the actual bug hadn't been fixed  

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I've attached a drop-in replacement for AMOSPro_Default_Resource.Abk.  This is from the V2.10 release.  As usual, back up your existing copy just in case...  This version allows a wheel mouse to be used for scrolling.  You need some software to recognise a wheel mouse on an Amiga, I use WheelMouse (attatched).
Following these discussions, I've also added shortcut keys for the buttons.  As explained in a previous post, these can't be intuitive ones like [Ctrl]+[P] for [Parent], so I've just used the function keys.  But you may find them useful.  Let me know.
The DBL source for the changes is attached and, as it's easier to read chroma-coded, there's a PDF of the listing.  
There's also a zip of the DBL Editor which I posted ages ago but should really go in the Downloads section under AMOS Factory / Development.  I know no one else will probably use it, but there's a heck of a lot of DBL used for the AMOS interfaces.  So I use it a lot for analysis of the original code and it will get quite a work out for some of the enhancements I have in mind.
Talking of enhancements, although I won't be doing anything with them until V2.10 is out, there's one for the file requester that will be dead easy:  I get fed up with the file requester always opening in the AMOSPro directory.  The code uses that directory by default and gets it from AMOSPro_Interpreter_Config.  When the requester gets a workout , the last directory visited becomes current, but this is all lost when you quit AMOS.  There's a spare slot in AMOSPro_Interpreter_Config at position 15.  I would like to use it for the user to define their own default directory.  The accessory Interpreter_Config.AMOS would need to have a screen added to allow the user to set this up (see, more DBL again  

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The shortcut keys for the file requester are:
| Shortcut Key   | Button | 
| [Return]    | [OK]    | existing | 
| [Esc]    | [Cancel]    | existing | 
| [F1]    | [Parent]    | new | 
| [F2]    | [Devices]    | new | 
| [F3]    | [Assigns]    | new | 
| [F4]    | [Sort]    | new | 
| [F5]    | [Sizes]    | new | 
| [F6]    | [Get Dir]    | new | 
| [F7]    | [Store]    | new |