Most begineer questions I never knew the answer

I have some problems with real basic stuff, I could never get a straight answer, the stuff is

1- How do I change player size? not window size, I would like for my window to capture X, Y pixels, but for the view size to be 2X, 2Y

2: How do I avoid having weird pixels? that means that C2 got problems when upscaling and went from 200X100 to 399X198, but I cant seem to find an option to fix this

3: I saw the platformer template, you can see that you can only locate stuff each 16 pixels, how can I do this outside of the template?

4: and whats the X:Y scaling? not familiar with that concept, never heard of it

You can look at the manual here:

https://www.scirra.com/manual/66/projects

1. You can change the "window size" to change the pixel size, and if you set the "full screen in browser" to "letterbox scale integer" which will keep it scaled by a 2x, 3x, 4x... amount depending on the the actual window size.

2. As above the "full screen in browser" option will help there.

3. I think this is the snap to grid option on the view tab:

https://www.scirra.com/manual/38/ribbon

4 no idea of the context of this question.

thanks, I figured 4 myself

"Set layout scale" is also useful for #1.