To create your own theme, simply click on ‘Themes' on the left sidebar. Then, choose 'Create theme.'
Alternatively, you can also click on the plus icon (+) beside 'Themes.'
You will then be prompted to choose how you want to create a theme: either from scratch or using Uizard's automatic theme generator (from an image, a URL, or a Sketch file).
If you choose to create a theme from scratch, you will be led to a screen where you can customize and add components.
If you choose to create using Uizard's automatic theme generator, you would need to upload either an image, a URL, or a Sketch file. There will automatically be a theme generated that reflects the styling properties of your upload.