# Auto-scale your drawing
The Exaplan **Autoscaler** can automatically calculate the scale of your uploaded 2D floor plan (PDF/Image) to match the real-world dimensions in a 1:1 ratio. This eliminates the need for manual scaling with the controls (+/-) and ensures precise alignment.
Once a reference object measurement is defined (e.g. a known wall length or marker distance), the Autoscaler computes the required scale factor and updates the projection accordingly.
### **Steps:**
1. Select the layer you would like to autoscale.
2. In the control options, choose "**Ref**" under the scaling controls.\
3. This will pop up the autoscaler preview window.
4. Click on any two points on the preview on the preview to define a reference distance
1. You can drag each point **(A/B)** individually to fine tune.
2. Hold the "**shift**" key to snap to axis.
3. Use the to **mouse wheel** to zoom in/out and **right click** to pan (navigation).
5. Type in the real-word distance (m, , in, ft)
6. Click **Apply**\
The system recalculates and applies the correct scale immediately.
3. This will pop up the autoscaler preview window.
4. Click on any two points on the preview on the preview to define a reference distance
1. You can drag each point **(A/B)** individually to fine tune.
2. Hold the "**shift**" key to snap to axis.
3. Use the to **mouse wheel** to zoom in/out and **right click** to pan (navigation).
5. Type in the real-word distance (m, , in, ft)
6. Click **Apply**\
The system recalculates and applies the correct scale immediately.
