This theme uses Elementor to build the header, header mobile, and side panel.

Go to Header Builders then click to Edit with Elementor to edit the default header or click Add New to create a new header.

Use widgets in OT Header category to build or edit the header.

Use For Header tab to setup header sticky ( Note: This option is only used to build the header builder. )

Note: with a transparent header, change the background color section to dark before building then clear background when all are done.