In Normal mode, you can copy text and paste the copied text in a certain location in the same document.
yy : copy the line under the cursor
nyy : copy multiple lines (current line and lines below)
p : paste copied text in the line below the current line
P : paste copied text in the line above the current line
In Normal mode, you can copy text and paste the copied text in a certain location in the same document.
yy : copy the line under the cursor
nyy : copy multiple lines (current line and lines below)
p : paste copied text in the line below the current line
P : paste copied text in the line above the current line