Tweak Discoverer Viewer layout

Hi ,
I am facing a strange problem while trying to roll out the discoverer viewer reports through discoverer viewer. The users, who have been using Excel sheets for years, are asking for lots of changes in the way discoverer viewer displays data. Alhough they are aware that there are lots of other advantages of this tool over excel, but still there are some problems that they feel are basic, and must be adressed. Can someone please help me out on these?
1) The row height of rows in discoverer cannot be altered, so even when the font size of data is just 6, the rows are wide enough to fit data of font size 10!. The layout/format options in discoverer do not provide option to shrink row heights, and so lots of empty space.
2) The reports have to be scrolled using Left ->, Down -> links if the number of rows and columns are large. Although, the Rows and Columns link can be used to fetch all rows and columns in one go, but that has to be done everytime a report is opened. The users want that the number of rows and columns be set to a high value by default. But I could find no place where this can be set as default for all reports.
3) A graphical logo can be displayed in the Title when using Desktop. But this is not available in Plus and Viewer. Moreover in the page where report is displayed, Oracle Discoverer Viewer logo is visible at the top which is not required. Effectively, what is wanted is missing and what not is very well there :-(. how do I do these changes?
4) The NULL values have been set to be displayed as '-' when reports were saved in Plus. But the Viewer still shows them up as NULL. I had to change each of the report in viewer to display the NULL as '-' by going to the Link 'Worksheet Options'. I can't understand that why there is no synch between Plus and Viewer for this setting. Surprisingly now, the worksheet options link has vanished from the viewer page after I did some changes a couple of weeks back, and now I am unable to do those changes too :-((. How do I bring the link back? or how do I set the NULL to be displayed as '-' be default for all reports?
Lots of questions I know... but I am stuck and this is actually affecting the acceptance of the tool among the users. They have been using the excel sheets that are very flexible(the world knows), but still they would be more than happy to use Viewer ,if at least these basic change are made.
Any help on any of these is appreciated.
Thanks
Goga

Any suggestions would be appreciated.

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