ImageCollage

ImageCollage[{image1,image2,…}] creates a collage of images imagei.

ImageCollage[{w1->image1,w2->image2,…}] creates a collage of images imagei based on their corresponding weights wi.

ImageCollage[<|image1->w1,image2->w2,…|>] also creates a collage of images imagei based on their corresponding weights wi.

ImageCollage[{w1,w2,…}->{image1,image2,…}] also creates a collage of images imagei based on their corresponding weights wi.

ImageCollage[{{image1,w1},{image2,w2},…}] also creates a collage of images imagei based on their corresponding weights wi.

ImageCollage[…,fitting] uses the fitting method to create the collage.

ImageCollage[…,fitting,size] creates a collage of the specified size.

Please visit the official Wolfram Language Reference for more details and examples on core symbols.