[Tex/LaTex] \renewcommand{\familydefault}{\sfdefault} Only Changes the Font in Bold

fontshelvetica

I'd like to change the font of the entire document to Helvetica. However, as the title says, \renewcommand{\familydefault}{\sfdefault} only changes the font in bold. The rest remains as is. What should be done to fix this partial change and have the whole document to be in Helvetica? Thanks in advance.

It will not change the font at that point, only from the next font change. add \normalfont if you want the font to change at the point that you make this declaration.