Ahoy, sailor! Welcome on board. If you wish to post on reWASD forum, start from a registration. We also kindly ask you to make a tiny effort and check if your question is already discussed. Thankfully, this process has been simplified with a Search field in the top right corner.
This is already possible in Steam controller configuration but if I combine Steam and REWASD, it gets very buggy. The typical shapes are Circle, Cross...