when I’m working, the board just show a part of it, I can’t design the part that is hidden , even I try to change the size, the most largest board is 1145px
I think you may be struggling with fixed position assets in sketch versus web layouts where the viewport is dynamic and the effect of the Box model. Maybe starting with some of the courses in the University would help you along. No way for me to gauge your knowledge. If I am wrong, I apologize in advance.
The only visual issue that I saw off the bat was your brand element has nothing inside it / no dimensions, so it would not be visible in preview. Give it dimensions or add something to it.
My brand element has nothing inside ,because my user interface seems very different than official videos of Webflow ,that I don’t even know how to start.
I’ll try another approach to the matter.
Thank you so much for having patience to solve my problem and giving knowledge to me.
My appreciation is beyond expression.