Drawing Straight Lines

[T Zipper]

About 10-12 years ago, I had a simple version of Corel Draw or some similar name. Then I got involved with Adobe products. But it is nearly impossible to draw simple straight lines with Adobe! The Corel program I used to have enabled a straight line to be drawn by clicking on one spot, then holding some button down (don't remember which) and clicking on another spot. Viola!
So my question is: "Is it simple to draw straight lines in Paint Shop Pro? If not, what program do I need to purchase.

[LeviFiction]

You're thinking of the "Shift" key in the case of PaintShop Pro. Click once, hold the "Shift" key and click again to draw a straight line with the paint-brush. (Photoshop can do this as well)

With Vectors you also hold Shift to restrict the angle to some degree. I can't remember if it's 15 or 45 degrees but it does allow you to restrict the nodes to straight across from each other.

[Ken Berry]

...And with the pen tool, you click Shift once (and hold) to establish a node. Keep holding down the Shift key, then move to the point where you want the straight line to end. Click once again and a straight line should appear between the nodes.

[T Zipper]

Thank you Levi and Ken for being so kind to help me solve my problem.