In an Action-Result relationship, which one is the mainpoint that will be used to connect to another proposition?
Good question! The Result is the main point, the one that receives the emphasis.
In the Discourse module, when you have labelled a subordinate relationship, notice that one of the labels has a grey circle around it (in an arc) or has a grey star by it (in a bracket). That is automatically done, and shows what the main point of a relationship is.
You can edit the emphasis by clicking on the relationship, and then clicking on the arrow in the pop-up box (the arrow is between the name of the relationship and its abbreviation). Keep clicking on it until the labels are in the right order, and the emphasis is where you want it.
If you are working with a Bracket, it is easier to change the emphasis: the grey circle, along with the grey star, marks the emphasized point; so just drag the grey circle from one proposition in a relationship to the other.