AE defaults to creating a comp in the previous comp's settings you set when you make a new comp. To change the dimensions, open the comp settings .
Thank you for your response but you are not getting my question.
It's not about changing the dimensions of the composition. All compositions in 640x1136 dimensions all have that backdrop of the image, when it's supposed to be transparent. This affects all comps that needs transparent background because for some odd reason AE slips in that background image for ALL comps in that specific dimension.
That's what I get for reading quickly. Have you tried deleting the AE Preferences file?
Awesome that worked!
Thanks Tim and Dave for your help, greatly appreciated
btw, I raised this issue to a few of Adobe Help Chat representatives and they all replied back as "it's a known issue, but there is no fix for it". and none of them were even apologetic about it. Just terse "yes it's a known issue" and when I asked if there is a way to fix it then simple response of "no".
I understand not all of them could resolve all problems, but Adobe's customer help service is on par with cable and wireless companies'.
Grateful to have such forum space where there are people willing to help each other. Thanks to Tim and Dave once again. Happy Thanksgiving!