Figure looks small and zoomed out

Doing some work with matrices and when showing the matrix as an image using imshow on a figure it looks small and zoomed out.

Code:

close all
clear all
clc

Z = zeros(9,20);
Z(2, :) = 8;
Z(:, 4) = 5;
Z(end-3:end, end-3:end) = 3;
Z(8, linspace(2, end, 10)) = 4;
figure
imshow(Z)

This is what my figure looks like:

How do I make the figure larger and zoomed in than it currently is. Also if possible, to make it default for matlab.

If this helps the resolution of my laptop is 3840 x 2160

Answer 1

[Les Beckham]

You have defined an image that is only 9x20 pixels. How big would you expect that to be (especially on your high resolution display)?

[Adam Tattersall]

Thanks for the answer, I've realised the mistake I have made. I need to use imagesc instead of imshow

Answer 2

[Image Analyst]

Try

imshow(Z, 'InitialMagnification', 1600);