Hold down the "Alt" key and type 0174 using the number pad on the right of the keyboard if using a Windows-based computer. When you release the "Alt" key, the symbol appears.
Hold down the "Option" key in the lower row of the keyboard and press "R" if using a Macintosh computer. The symbol should appear immediately.
Open Microsoft Word if you want a specific shortcut for that program on your Windows computer. Click "File" on the top menu bar. Select "Options" from the menu that appears and then click "Proofing." Select "Autocorrect Options" on the right. Make sure the box above "Replace text as you type" is checked under the symbols sections; the registered trademark symbol should already be in the list of symbols. Use (r) when typing in a Word document; the program should correct to the symbol.
Click "Word" near the top of the page and select "Preferences" from the drop-down menu if using Microsoft Word for Mac. Click "Autocorrect" on the top menu bar. Make sure "Symbol Characters..." is checked under "Replace as you type." If not, check the box. Click "Ok." Type "(R)" in your Word documents; the program will automatically change it to the symbol.