 Welcome back to the session on latex. In this session, we will learn to specify the aspect ratio. What is an aspect ratio? It is nothing but the relationship between the width and the height of the screen, be it TV, mobile, tablets, computers, laptops, etcetera. Some of the standard aspect ratios you might be aware of are 4 by 3 and 16 by 9. Nowadays, the devices are generally of 16 by 9 aspect ratio. Let us open a PDF in PDF viewer and view it in presentation mode. Well, the slides are prepared in the default 4 by 3 aspect ratio. Since my device here is of 16 by 9, I can see these white patches on the sides. Let us go back to our slides. This can be taken care of by writing the aspect ratio as shown here. Let us do it in tech studio. Let us write aspect ratio equal to 16 by 9. Build and run. All right, I guess it did become wider, but let us confirm it by looking at the PDF. Let us open this file in presentation mode. Well, now our slides are in 16 by 9 aspect ratio. Let us switch back to our slides. So, in this session, we learn to mention the aspect ratio. Thank you. Have a nice day.