Saving Images onto an Image, and editing that Image
<p>Apologies for the tongue twister of a title, hopefully I can be clearer here! </p>

<p>I am doing a project in university, and I want to basically create a screen mock-up application.</p>

<p>I want to be able to drag components (buttons, labels, etc.) onto a screen and use them to picture what a website/application would look like.</p>

<p>I imagine that these components would be images themselves.</p>

<p>I'd like to know is it possible to create a screen mock-up with these components i have mentioned.</p>

<p>Ideally, you should be able to open a previously created 'screen' and move the components around and save the screen as the original.</p>

<p>Thanks a million in advance! </p>