Copy, cut, and paste

What it does

Select a cell and press Ctrl+C to copy or Ctrl+X to cut, then select a target and press Ctrl+V to paste.

• Copy + paste adjusts the formula's relative references by the paste offset — =A1+B1 copied from C1 to C3 becomes =A3+B3, while $-anchored parts stay put (=$A$1+B1 → =$A$1+B3). The source is left untouched and the clipboard stays loaded, so you can paste it again.
• Cut + paste moves the cell: the formula is written to the destination verbatim (no reference adjustment) and the source cell is cleared. The clipboard is consumed after that one paste.

Verified behavior

Matches Google Sheets: In Google Sheets, copying a formula and pasting it adjusts the formula's relative references by the row/column offset (copying "=A1+B1" from C1 to C3 yields "=A3+B3"), while $-anchored parts stay fixed ("=$A$1+B1" → "=$A$1+B3"); copy leaves the source and the clipboard intact, so it can be pasted again. Cutting and pasting instead MOVES the cell: the formula is written to the destination verbatim (no reference adjustment) and the source is cleared, and the clipboard is consumed after that one paste. (Sheets additionally rewrites OTHER formulas that referenced the moved cell so they keep pointing at it — that cross-reference remap needs engine support and is not yet modeled here; tracked as a follow-up.)

Copy a relative formula and paste — references shift by the offset

Given

• A1 = 10
• B1 = 20
• C1 = =A1+B1
• A3 = 5
• B3 = 7

When I click C1, then press Control+c, then click C3, then press Control+v

Then

• C3 shows 12
• C1 shows 30
• C3 has formula =A3+B3
• C1 has formula =A1+B1

Copy shifts references by both the row and the column offset

Given

• A1 = 10
• B1 = 20
• C1 = =A1+B1
• B3 = 7
• C3 = 5

When I click C1, then press Control+c, then click D3, then press Control+v

Then

• D3 shows 12
• D3 has formula =B3+C3

Cut and paste — the formula moves verbatim and the source is cleared

Given

• A1 = 10
• B1 = 20
• C1 = =A1+B1

When I click C1, then press Control+x, then click C3, then press Control+v

Then

• C3 shows 30
• C1 shows null
• C3 has formula =A1+B1