Tartarus Pro 3 Simultaneous Keypresses

Manually record the macro you want, then click to each of the keys in their pressed down state and under properties adjust the delay. Will say most games register multiple key presses done under 0.5 to 1 second to be effectively done at the same time. if you really need it exactly at the same time try what I suggested

Thank you for your reply.  I think I have discovered the issue.  Despite the macro being saved the function whereby you click the plus symbol to assign it to a key does not appear to be working.  I select the Tarturus key I want and save but when I return to that screen it still says I have not assigned a key to the macro.  No fix obvious unfortunately.  Tried reinstalling Synapse but still the same.

 Using a keyboard tester it only shows “c” when I press the #19 key on my Razer.