You can type l in ipdb to show a few more lines of the current context
and you can keep hitting l and it continue revealing more lines from the file
If you want to show more lines of context around the current line you can type l to get the current line. And then type l curr_line - 10, curr_line + 10. Say I was on line 50 and I wanted to see the surrounding 20 lines. I would type: l 40,60 to see more.
As noted by @jrieke in a comment, you can also hit ll to get a bigger chunk of context. One nice thing about ll is it will print all the way back from the start of the current method (whereas consecutive ls reveal further lines below your breakpoint).