increase resolution for landscape

After I create a landscape and sculpt everything. I found out the resolution is too low. How do I increase the resolution?

if you go to the Landscape tool, press the “Manage” menu. From here you should be able to resize the landscape.

I go to change component size but i can only change the “section size” , “sections per component” and resize mode. When I tried them the land will increase the size. I just want more greater resolution without changing the size.

Are you using a heightmap or did you shape the landscape manually?