I'm trying to get the background color which is linear gradient from this template but it appear as background image , any help please?
In Figma, images are actually a type of shape fill. Like colors or gradients.
In the template you linked, you can replace the gradient background with a different one, like a photo background.
This technique won't create a separate layer for the image. Instead, it's a fill for the parent frame.
Steps:
On that file, go a blank area and then insert the photo/picture that you actually want as the new background image for the webpage design.
Select the photo/picture.
On the fill panel, click leftmost part of the Image fill to select it. Then press CTRL+C
to copy it.
Select the background frame that has the gradient.
On the Fill Panel, delete the Image. Because the gradient design is actually a pasted image.
CTRL+V
.