Optionally, you can ask conference participants whether they want to give a presentation (a talk, a poster, etc). If so, they
will be shown a drop-down list with presentation options. You can choose which options to display: None, Poster, Short Talk,
Long Talk, Talk, or any of 6 options which you can name as you wish (see snapshot below). You can also decide whether to
ask participants for a title of their presentation and an abstract. This will only be displayed if the people registering
do not select "None" from the drop-down list. An author list will be requested if you ask for an abstract.
To select which information you want to collect, tick the check boxes in the 1st column (see screenshot below).
To determine whether the person registering is required to provide this information, or if it's only optional, tick the check boxes in the 2nd column.
(Of course if the person registering selects "None", then the title and abstract are not required.)
The registration form will then look like this: