Starting balance show as a “transaction” like record when drilling down on fixes assets purchased prior to the start date. It would provide a consistent interface if purchase documents could be attached to the starting balance record. The original tax invoice is a useful document (defining the details of what was purchased / is the fix asset) but if added by starting balance there is no transaction to attach it to.
Also allowing attachment at edit screens would be more intuitive as has been suggested by others.
And allowing attachment to other record types
Clearly as this thread describes there are other solution, and there are other issues with Manager which imo are more pressing. So really just expressing support for a low priority idea.