Why don't you just move your fingers, hand and arm out when long fingers are playing, and in when short ones are playing... taking the topography of the keyboard into account, of course.
Hold on, while it may be handy to move your fingers, hand and arm out to grab at comic books the piano is something a little different. In grade 5 or 6 we learn all kinds of scales including formula pattern which eliminate these elementary issues, if taught properly. ..I'm very happy to see your interest and wish you luck in the big day when you can play with your hands together. If your attempting now, best be patient and learn how to do scales....that way you can offer real assistance when sincere questions are asked.
BTW arn't you the person who said I should be banned...with no explanation...weird, just joined this week....will prob leave due to your boorish comment though.
Incedently...if theres anyone here who thinks they know how to do scales...lets have
right hand ....4 octaves C major scale ( slow...countable).....left hand F major arppeg...4 octaves at slow speed, countable with reasonable legato ( all three inversions), perfect timing, perfect hand motion, ...arched strikes, clarity legato...in other words no jerking elbow like the post I'm quoting by uh...jmanpno..... camera from the top.Give it a go jmanpo , maybe your ready to put your hands together on the piano instead of the big heap of comic books.
a model would help this forum...I'm not providing...you guys know much more then myself...I'm sure of it, so lets see. I want to learn.