• Open your Figma file.
• Press Shift + R or head to the main menu and pick View > Rulers to turn on the rulers.
• You'll see rulers pop up at the top and left edges of the canvas.

• Hover over the left ruler for a vertical guide or the top ruler for a horizontal one.
• Click and drag from the ruler onto the canvas to make a guide.
• Drop the guide where you want it.

• Click on a guide to select it.
• Drag it to move it around the canvas.

• To keep guides from moving, lock them by pressing Ctrl + Shift + ; (Windows) or Cmd + Shift + ; (Mac).

• To show or hide guides, press Ctrl + ; (Windows) or Cmd + ; (Mac).

• When you move or resize objects, they'll snap to the nearest guide automatically.
• This helps keep everything lined up nicely.

• To delete a guide, click on it and press the Delete key.
• Or, drag the guide back onto the ruler to get rid of it.

• Right-click on the ruler and choose "Reset guides" to clear all guides from the current page.

Follow these steps to make the most of Figma's ruler and guide features for spot-on alignment in your designs.