Photoshop CC: Have a template that I moved image into. Image is too small. How do I resize the image while in the template? Or must I go to original image file and resize there again and again until I get the right fit?

Question

I have a template that I am able to plug different pictures into at different times.  The problem is that when I plug an image into that template, I find that the image is either too big or too small.  Is there a way to plug the image into the template and resize the image (and not the template itself) OR will I have to go to the file with the original image and resize it there and then try to plug it in to the template to see if it fits------and if it does not fit, go back to the original file with the image and resize it again and see if that fits---and so on and so on...........?  I have tried the" image size" option but it's hit or miss------mostly miss!
Thanks!

Answer 1

Read up on Smart Objects. It looks like you have no idea as to how to create and use them.
Jut create a Smart Object from the layer containing whatever it image it is that you are "plugging into your template".  But you do need to learn the application at its most basic levels.
Photoshop is a professional level application that makes no apologies for its very long and steep learning curve.  You cannot learn Photoshop in a forum, one question at a time.
Or is it possible that you don't even have Photoshop proper but the stripped-down Photoshop Elements?"
If the latter is the case, you're in the wrong forum.  This is not the Elements forum.
Here's the link to the forum you would want if you're working in Elements.:
https://forums.adobe.com/community/photoshop_elements/content
If you do have Photoshop proper, please provide the exact version number of that application and of your OS.
(edited for clarification)