How to toggle sprint on Lunar Client

Info: Im a young youtuber who has dreamed of becoming a well known youtuber with 1000 subs and thats what ive dreamed of for over 3 or 4 years. i finally have what i need to even upload a video. i work hard on my videos to ensure you like them. they may not be good but im trying to improve. Thank you all!!!! Setup (external) Razer Black Widow Keyboard Razer Naga Trinity Mouse Dell g7 Gaming Laptop (its trash) Setup (internal) i7 8750H processor GTX 1080 Graphics Card 64 bit pc 1920 x 1080 Monitor (Build In) ------------------------------------1.8.9 Thanks to all who watched. Have an awesome day!!!