Use the Brush tool on a vector layer to create a brush shape. Brush shapes can be re-edited in terms of brushes used, line shapes, and colors.
The following buttons will appear once you select a shape you wish to modify on a vector layer. These can be used for basic editing. You can also display windows and menus for more advanced editing.

①Drag to zoom in or out on a shape.
②Rotate the shape to any angle.
③Display a window for editing shape attributes.
④Display the vector command menu.

Lines drawn on a vector layer can be modified later to change the type of pen, thickness, and color of the line.

Select ②[ Vector ] from the ①[ Tool Selection Window ].
Choose the line you want to edit, then tap on the ③[ Edit Button ].

Adjust the color, pen type, and line thickness to your liking.
Once you're done adjusting, apply it by tapping on ④[ ✔︎ ] to finish.
You can easily change the atmosphere of the illustration without redrawing the lines.

The Simplify Vertices feature reduces the number of vertices in a brush shape and converts it into a simpler line. Simplify makes it easier to perform the edits described in the following sections as well as smooth out unwanted wobbliness in curves.

The example illustrates how to reduce the number of vertices while maintaining the form of the shape to the extent possible.

With the vector layer with your drawing selected, open the ①[ Tool Selection Window ] and select ②[ Vector Tool ].

Tap ③[ Select ] and ④[ drag ] to select the area you wish to modify.
Tap the ⑤[ ︙button ] to display the vector command menu.
Select ⑥[ Simplify ] from the menu.

⑦[ Vertices ] will appear once the brush shape simplifier is activated.
The ⑧[ Strength ] slider adjusts the number of vertices. The more the slider is moved to the right, the fewer the number of vertices.
The ⑨[ Angle Threshold ] slider specifies the degree of the angle to be maintained. The higher the value of the angle threshold, the easier it is to maintain the shape of the original line. If the points you want to keep angular become rounded, move the ⑨[ Angle Threshold ] slider to the right.
Use the ⑩[ Show Points ] to toggle the visibility of the vertices.

By adjusting the slider, we can reduce the number of vertices while preserving the form of the shape.

Select ②[ Vector ] from the ①[ Tool Selection Window ].
Choose the line you want to edit, then select ④[ Edit Vertices ] from the ③[ ︙ button ].

Drag the ⑤[ vertices ] to shape the line as desired.
Once adjustments are done, tap on ⑥[ ✔︎ ].

You have adjusted the line after drawing it.

If you want to delete vertices, you can do so using the following method:

Select ⑧[ Edit Vertices ] from the Vector Command menu. Open it by tapping ⑦[ ︙ button ].
Select the ⑨[ vertices ] you want to delete. The selected vertices will turn blue.

You can select multiple vertices by dragging them diagonally.

Select ⑪[ Delete Selected Vertices ] via the ⑩[ ︙ button ].
The vertices have been deleted.

The number of vertices will be fewer if you draw quickly and more if you draw slowly.

The handle edit feature of brush shapes allows you to adjust the orientation of a line at specific vertices in the brush shape. It is easier to edit handles after reducing the number of vertices by using the [shape simplification] function described above.

The example illustrates how to adjust the curves of a line drawing depicting wrinkles in clothing.

Open the ①[ Tool Selection Window ] and select ②[ Vector Tool ].
Tap ③[ Select ] and ④[ drag ] to select the area you wish to modify.

Tap the ⑤[ ︙button ] and select ⑥[ Edit Vertices ].
The brush shape’s vertices will be displayed once you have switched to Edit Vertices mode.
Now, press and hold the vertex for which you want to adjust the orientation of the line to select handle mode.
We will select ⑦[ Smooth ] for this example.

The orientation of the curve can be modified by moving the ⑧[ handle ].

There are three types of different handle modes. Use them in accordance with your applications.

[ Smooth ]
The two handles extending from the vertex are always aligned and extend and retract in tandem.
Ideal for creating smooth curves.
[ Normal ]
The two handles are always aligned, but their lengths can be adjusted individually.
Ideal for fine-tuning shapes while maintaining the smoothness of curves.
[ Angle ]
The two handles can be moved independently of one another. Can also be used to create acute angles, making it ideal for creating zig-zagging curves.