As well as Recording a decision (accepting/ rejecting/ withdrawing a submission) you can also move a submission to another stage.
Click on Decisions in the left hand panel to see the decisions table. If you are using multi stage, the different stages will be shown across the top of the screen. In this case you can switch between General Abstracts and Invited Abstracts by clicking on the tabs at the top of the screen. In the screen below, the General Abstracts stage is selected and by clicking on the arrow in the Decision column, an individual abstract can be moved into another stage.
The decision status (in the example below the decision is Accepted: Oral) will be carried through to the new stage.