How to load existing figure into GUIDE UIAxes

I have an image with plots and labels layered on top that has been saved as both a .fig and a .jpg. My app loads the picture to display it, but the .jpg images are too blurry.

How do I load an existing .fig file into a UIAxes element? I already have the image saved as a property using openfig

[Adam]

UIAxes are for use with App Designer rather than GUIDE. Do you mean just a regular axes?

If you want a .fig transferred to a pre-existing axes I guess you'd have to load the .fig and then use something like copyobj to transfer it, but it's rather messy.

[Brian Downey]

Whoops, not using GUIDE. I'm using UIAxes in app designer

[Adam Danz]

Juan Pablo Pérez Durán's answer moved here as a comment

Did you find out how to? I'm struggling with the same thing:(

[Adam Danz]

As Adam mentioned above, you'll either need to copy all of the axis elements to the uiaxes

copyobj(ax.Children, app.UIAxes)

or completely replace the app axes with the axes from the external figure

newax = copyobj(ax, app.UIFigure);

and then reposition the copied axes, then delete the uiaxes

set(newax,'Units',app.UIAxes.Units,'Position',app.UIAxes.Position) % and possibily other properties

As Adam mentioned, this can get messy and my lines above are the untested bare minimum.