It depends on what you are trying to do here. In composer there is an option to Restrict the transition based on a rule. is that what you are trying to do? If so, in composer, click on the transition, then open the property editor, and click on the Restrict by Rule. then you will get a dropdown list option to select the rule you want to use.

Thanks pearsallc 



I read that in the documentation, but I didn't find (Restric By Rule) option as you see in the attached screenshot

an "otherwise" transition from a decision won't have this option due to the need to always be able to perform an otherwise condition. Is your transition an otherwise branch from a decision? 

I dont find the option how to add a rule a decision transition 

can you show your workflow where the transition you are talking about is? that will help determine what options are available.

For example see this transition on the mouse hover I am able to see the associated rule

but when go to the property editor I don't see "restrict by rule" option, I am trying to modify an existing huge workflow that have built on SBM:

It appears that this is the "Otherwise" transition. if you click on Valid Docs? and look at the rules that will tell you if this is, in fact, the otherwise transition.

Restrict by Rule generally applies to regular transitions (not Update transitions) leaving a State, not a Decision. So in other words, you should be able to restrict by transition going into a decision. Then, use the rules assigned to branches from the transition to control the desired outcome - as stated, the Otherwise branch neither has a rule nor can be restricted by rule.

so the "trial with invalid mpi" transistion has a rule associated with it I tried to duplicate it and I tried to add a regular transition but I am not able to find that option to edit or add a rule

This transition is going out of a decision (the diamond "valid docs"). Because of this, it cannot have a rule. If you want to restrict this transition, you will need to edit the rules on the "valid docs" decision instead of adding the rule to the transition. If you need more clarification, please share a screen print of the properties for the Valid Docs decision. It will look something like this:

That will help us to explain better.