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Other actions possible :
Top left is name of billing officer logged in.
Top right you can immediately log out.
Top right you can select help to get more details on Mercurius
Going immediately to a certain page is possible by entering page number middle bottom. There you can also find some paging arrows.
Tooltips are shown when hovering over a field and pausing for a short period.
Clicking on a line opens the detailed pane for that document (so all available fields are shown). From here you can easily open message files and attachments.