how to set boundaries imshow

how to set boundaries imshow, how to set a position and outerposition?

for example, I want to stretch the image over the entire space, how do I do this?

Answer 1

[Image Analyst]

You can set the .Position property of the axes to enlarge it so that it fills the entire figure window, or close to it.

ax = gca;
g = gcf;
ax.Units = 'normalized';
g.Units = 'normalized';
ax.Position = [0, 0, 1, 1];