Newbie & help with combining layers

Hello All,

Please excuse my ignorance but I have only just started using photoshop.

I have two images, the first one I have cropped to the correct size and the second is like a thumbnail that needs to be pasted in to the top right hand corner of the first image. How can I do that. I'm can't find a copy/paste tool that lets me paste the second image as a new layer on to the first.

Thanks in advance and sorry if this is a silly question.

just drag and drop the thumbnail onto the canvas.

or...

Ctrl+A to select the thumbnail layer, Ctrl+C to copy the selection and then Ctrl+V on the other canvas to paste it.

Welcome to the forum, you might want to read the manual first or at least consult Photoshops own help files F1, for the more basic questions.

Much appreciated. Thanks.