Fills & Hatches >


Calculating the area of a design is already difficult, but doing it live, in an active sketch, without a single straight line, in seconds? Now that’s a tall ask!! Meet "Smart Fill & Hatch", a fill and hatch tool that not only calculates the area of the fill or hatch, it actually updates as you sketch. This tool will soon become essential in your architecture, interior design, or landscape design drawing practice.

Architecture plan drawing by SO-IL.

How to Select with Smart Fill & Hatch

Below is a quick "How To" guide to select any region to fill, hatch, or calculate the area on any drawing, sketch, illustration, or image.

Step 1. Activate Smart Fill

Tap the Smart Fill button to begin.


Step 2. "Target" Selection Modes

The Target is the default selection mode. You can use the target to fill, hatch, or calculate the area of a region that is already drawn – no matter how unique the shape is. Be sure that your lines are all closed for the target mode to work. 

Pro Tip
If your lines aren't contrasting the background enough, the tool might not find the right boundary.

Single Region

Drag the Target into a single closed region to select it.



Toggle the Target Mode to multi-region. Then, drag the target into any closed region to select it. Repeat this process to select multiple regions.


Adjust Your Tolerance

If your fill is spreading over the entire screen or if it's only getting a small piece of your drawing, tap the Tolerance button and adjust the slider to change your fill tolerance.


Step 3. "Lasso" Selection Modes

Use these "Lasso" Selection Modes to define your own boundary to fill with a freeform curve or with straight edges.

Freeform Lasso

Drag the Pencil to create a freeform curve region.


Polygon Lasso

Tap the Pencil to define each point of your straight-sided polygon region. To close your polygon, tap on the start point.


Step 4. "Marquee" Selection Modes

Use these "Marquee" Selection Modes to quick-select a circular or rectangular region.


Drag your Pencil to create a circular or elliptical selection.



Drag your Pencil to create a rectangular selection.


Step 5. Add Your Fills & Hatches

Learn more about Smart Fill here >

Learn more about Smart Fill here >

How To Video

Enjoy this how to video highlighting how to get started with Smart Fill.

Additional Resources

How To...Smart Fill

Read More Here >

How To...Smart Hatch

Read More Here >

Version: 5.3

About Morpholio Trace - Sketch Cad

Why Morpholio Trace for Architects, Landscape Architecture and Interior Designers?

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