Oh, use the grid, in both the schematic and the board.
In the schematic capture, I almost always have it set to 0.1 inch; not much reason to change it.
In board layout, I start with it set to 0.1" to see how things are aligned. The board is always slightly oversized when you start; hold down the Ctrl button and left-click each corner to "snap" it to the grid.
If parts are not aligned to the grid, I might reduce to 0.05" to get things lined up, and when running traces between the pins of IC's.
Don't turn the grid off, or go exceedingly fine unnecessarily, or you will wind up with a mess.
In the schematic capture, I almost always have it set to 0.1 inch; not much reason to change it.
In board layout, I start with it set to 0.1" to see how things are aligned. The board is always slightly oversized when you start; hold down the Ctrl button and left-click each corner to "snap" it to the grid.
If parts are not aligned to the grid, I might reduce to 0.05" to get things lined up, and when running traces between the pins of IC's.
Don't turn the grid off, or go exceedingly fine unnecessarily, or you will wind up with a mess.