How to add logo to Template

As I can assign the logo on the Vortex template.

Change HTML content of custom HTML module in logo module position.

I created a custom html module, this position I have assigned the logo and then I assigned the path of my logo is on the upper right side of the module.

Note: Even with this I can not see my logo on the front end of my site.
In addition to this could tell me what is the measure of the logo that has the demo of the template.

Not background, when you open module configuration you have WYSIWYG editor, insert image there

Image and code is inserted, if so what would be the code to add in the html editor.

simple img tag:

<img alt="alternative text" src="<image url>" style="width:<?>px;height:<?>px;"/>