Planera supports three types of relationships
FS - Finish to Start
SS - Start to Start
FF. - Finish to Finish
Planera also supports Lags - both positive and negative lag durations.
By default, all relationships are created with FS and 0 Lag.
You can change the relationship type as well as add lags by doing the following:
Click on the connection arrow.
A context menu will pop up where you can change the relationship type and add lag.