The grid method is an inexpensive, low-tech way to reproduce and/or enlarge an image that you want to paint or draw. The grid method can be a fairly time-intensive process, depending on how large and detailed your painting will be. While the process is not as quick as using a projector or transfer paper, it does have the added benefit of helping to improve your drawing and observational skills.

In a nutshell, the grid method involves drawing a grid over your reference photo and then drawing a grid of equal ratio on your work surface (paper, canvas, wood panel, etc). Then you draw the image on your canvas, focusing on one square at a time until the entire image has been transferred. Once you're finished, you simply erase or paint over the grid lines, and start working on your painting, which will now be in perfect proportion! Yay.

To use the grid method, you need to have a ruler, a paper copy of your reference image, and a pencil to draw lines on the image. You will also need a work surface upon which you will be transferring the photo, such as paper, canvas, wood panel, etc.

To draw the grid lines on paper, I would recommend using a mechanical pencil, so that you can get a thin, precise line. Be sure to draw the grid very lightly, so that you can easily erase it when you are finished.

In NIFT exam you will be asked to draw the images given in the question paper using the Grid design method. You can check out the link mentioned below for getting a better idea about the questions asked in the exam:

https://www.shiksha.com/design/fashion-design/articles/nift-entrance-exam-previous-years-papers-nift-cat-questions-2010-2015-blogId-12091

All the best!!