Changing font size in LaTeX documents

[askor]

Can someone please tell me how to change the font size of text and Latex?

Thank you

 

[Wrichik Basu]

A simple Google search should have helped you find the different commands for changing font size in LaTeX. See this: https://www.overleaf.com/learn/latex/Font_sizes,_families,_and_styles

 

[askor]

I forgot to mention. What I meant is in this forums.

 

[askor]

I also would like to know how to write the integral symbol in this forums like this:

Instead of this:

 

[Wrichik Basu]

I forgot to mention. What I meant is in this forums.

Most of the normal LaTeX font sizes work here too: $${\Huge \text{Physics Forums}} \quad {\normalsize \text{Physics Forums}} \quad {\tiny \text{Physics Forums}}$$ This was created with $${\Huge \text{Physics Forums}} \quad {\normalsize \text{Physics Forums}} \quad {\tiny \text{Physics Forums}}$$

I also would like to know how to write the integral symbol in this forums like this:

View attachment 280258
Instead of this:

View attachment 280259

The latter is inline math, created by appending ## to the beginning and end of the LaTeX code. The former is display-style. Use $$ instead of ##:
$$\int_a^b \sec \theta\ \mathrm{d} \theta$$ and

$\int_a^b \sec \theta\ \mathrm{d} \theta$.

Also, have a look at our LaTeX guide: https://www.physicsforums.com/help/latexhelp/