Having the ability to assign a default export format for previewed reports would save a lot of time when having to create multiple reports for multi-years. For example, I currently have to click on the drop down to select Excel when exporting a Trial Balance Report for multiple years.
You can do that. Attached is a screenshot. While in the General Ledger click on "Tools" in the toolbar and select "Options". Select the Export tab and set the default report format for exporting.
I have a series of blog articles in the Tips and Tricks section reviewing the various functions in the Options area.