Lock a dimension, an item or a layer

TerraPlan has three kinds of lock. Use them once something is measured and right, so a stray drag doesn't undo your work.

Lock a dimension

A length you type is locked by default. The pad shows 🔒 Locked at the top, and after you tap ✓ the length label shows a 🔒.

When you drag a corner next to a locked length, the corner swings around the far end so that length stays the same. If both lengths at a corner are locked, the corner doesn't move.

To unlock a length:

1. Select the wall and tap the length with the 🔒.
2. Tap 🔒 Locked so it reads 🔓 Unlocked.
3. Tap ✓.

Lock an item

1. Select the item.
2. Tap Lock on the selection column. TerraPlan says "Locked: it can't be moved by accident."
3. To change it again, select it and tap Unlock.

A locked item can still be copied.

Lock a layer

1. Tap Layers at the bottom right.
2. Tap Lock next to the layer. Walls & rooms is the first one, so you can lock the walls while you place piers, readings and zones.
3. Tap Locked to unlock it.

Items on a locked layer can't be tapped, box-selected or trimmed.

Related questions

I tap a wall and nothing happens.

Its layer is probably locked. Open Layers and look for Locked next to Walls & rooms.

A message says "Locked. Tap Unlock on the bar to move it."

That item is locked. Tap Unlock on the selection column on the left.