Module One
Module Two
1 of 2

1.1.5-How to sketch – parallel lines, vertical lines & diagonal lines

How to sketch parallel,vertical&               diagonal line?

types of different line

What is a line?

It’s a point which travels along a certain trajectory.The line can be straight or curved. We’re starting from a simple straight line and move up to tricky and composite curves.

Most of the lines in an average sketch are straight lines. With practice, your straight lines will naturally improve, but these basics may help you improve quickly.

  • Hold your pencil naturally, about 1″ back from the point, and approximately at a right angle to the line to be drawn.
  • Draw horizontal lines from left to right with a free and easy wrist and arm movement.
  • Draw vertical lines downward with a wrist and arm movement.
  • Draw curved lines using finger and wrist movements.

Drawing a line seems easy, but does your mind and body work in a union to perform this task successfully?

There is a difference in how we create shorter and longer marks and using the right muscles is crucial. Take a sheet of paper and any tool you like. Draw a short line (something about 1 cm is enough) and observe how your fingers work together, moving slightly while holding your tool.

Then draw a longer line (4-5 cm). You’ll notice that your wrist becomes active to extend the line. Now create an even longer mark (like 9-10 cm or more). This becomes possible thanks to your elbow muscles.

Drawing Straight Lines

Let’s focus on drawing straight lines freehand, without a ruler. We’re not trying to create “perfect” lines right away.

If you feel unsure about drawing a straight line, I’d recommend outlining a line in pencil with a ruler. This line should be barely visible as it will serve as a reference.

When you’re drawing a line, pay attention to the pressure on the tool and the speed of movement. Don’t push too hard. You’ll notice that the starting and ending points of your lines depend on how lightly you touch the paper and how quickly your tool moves.


Parallel lines

Parallel lines are two lines that are always the same distance apart and never touch. In order for two lines to be parallel, they must be drawn in the same plane, a perfectly flat surface like a wall or sheet of paper.

Parallel lines are useful in understanding the relationships between paths of objects and sides of various shapes. For example, squares, rectangles, and parallelograms have sides across from each other that are parallel.

In formulas, parallel lines are indicated with a pair of vertical pipes between the line names, like this:

AB || CD

Vertical lines

A vertical line is a line with an undefined slope. Note that this is different from an infinite slope. The slope of a vertical line is said to be undefined. It may be said to go”straight up and down”

Diagonal line

The definition of diagonal is something with slanted lines or a line that connects one corner with the corner furthest away. An example of diagonal is a line going from the bottom left corner of a square to the top right corner

Basic Hatching Practice

To practice hatching with straight lines, you can use small squares/circles/rectangles that become the borders for the hatches, or just go at it without any borders at all.

Each one of your hatching swatches should have a uniform look and all of the hatches should flow in the same direction.

The hatches can be horizontal, vertical, or inclined at any degree. You can start drawing slowly, then create a new series of lines, moving faster and faster. However, the speed of drawing isn’t the focus of this exercise.

Blocking in a Freehand Drawing


Over the years, freehand sketchers have developed all sorts of tricks to improve speed and accuracy. Methods for finding midpoints or quickly blocking in straight vertical and horizontal lines are just a few secrets of the technical sketching craft that can come in handy, even today. When a great idea hits, or you need to sketch quickly at a meeting or on a job site, you might not have access to a CAD system, or even a ruler.


Drawing Long Freehand Lines


For long freehand lines, make light end marks and lightly sweep your pencil between them, keeping your eye on the mark toward which you are moving. When you are satisfied with the accuracy of your strokes, apply more pressure to make a dark line.

Blocking in a Border Freehand

Hold your hand and pencil rigidly and glide your fingertips along the edge of the paper to maintain a uniform border.

If your line looks like this, you may be gripping your pencil too tightly or trying too hard to imitate mechanical lines. Slight wiggles are OK as long as the line continues on a straight path. Occasional very slight gaps are fine and make it easier to draw straight.

Vertical lines are drawn from the top down, horizontal lines from left to right, left oblique lines from left to right, right oblique lines either way, according to the degree of slant. There is no reason, however, why good muscular training is not obtained by drawing lines either way.


Exercise 1. A straight Line Through 2 Points

Put two points on paper.Ghost a straight line from one point to another, feel the trajectory.Then drop a pen on paper and draw a line with the same motion.

Here you have two options: you can either draw eight lines over this one or put several lines parallel to it.

I recommend you to vary your drawing practice. It’s like training in the gym. Comprehensive training approach includes working on different muscle groups. The same principle applies to a drawing workout.


Exercise 2. Finding the Missing Angle of a Rectangle

Using the same ghosting technique draw two perpendicular lines, just as a corner of a rectangle. Your goal is to find the missing corner and complete the rectangle. Ghost back and forth along the trajectory of an imaginary angle. When you feel the position of the angle, put a dot right there.

Now find two missing lines, intersecting at this dot. Draw them one by one, using a familiar ghost technique.

Repeat this exercise sketching rectangles of different proportions and in various positions. All techniques offered in the lesson are perfect warm-ups before a sketching session.

Exercise 3. A Straight Line Through 3 Points

This exercise will improve your ability to visualize your lines.

The goal is to align three dots on a straight line, maintaining equal distances between them.

  • Put two dots.
  • Ghost a straight line between these dots. Your goal is to find the middle. Move your arm back and forth. Look at the area of the desirable midpoint.
  • When you feel the direction of a line and visualize the midpoint, put a dot at this point.
  • Draw a straight line through all three points.

Please Wait..