First week on register — any tips

How do you keep your cool when the line hits 10 deep and someone changes their order mid-swipe? I just wrapped my first week on the POS at a fast-casual place, and I’m juggling mods, loyalty scans, and remembering to offer sides without sounding robotic. Any tips for pacing the convo and fixing mistakes fast without making the next guest wait?

‌⁠‍⁠​‍​‍‌⁠‌​​‍​‍​⁠‍‍​‍​‍‌‍‌⁠‌‍‌‍‌⁠​⁠‌‍‍‍​‍​‍​‍⁠​​‍​‍‌‍‍⁠​‍​‍​⁠‍‍​‍​‍‌‍⁠‍‌‍‌‌‌⁠‌⁠‌‌⁠⁠‌⁠‌​‌‍⁠⁠‌⁠​​‌‍‍‌‌‍​⁠​‍​‍​‍⁠​​‍​‍‌‍‍‌‌‍‌​​‍​‍​⁠‍‍​‍​‍‌‍⁠‍‌‍‌‌‌⁠‌⁠​‍​‍​‍⁠​​‍​‍‌‍‌​​‍​‍​⁠‍‍​‍​‍​⁠​‍​⁠​​​⁠​‍​⁠‌‌​⁠​‌​⁠​‌​⁠​​​⁠‌‌​‍​‍​‍⁠​​‍​‍‌‍‍​​‍​‍​⁠‍‍​‍​‍‌⁠‌‌‌‍⁠⁠‌​‌​‌‍​⁠‌⁠‍‍‌⁠‌‍‌​‌‍‌​‌‌‌‍⁠⁠‌‍⁠‍‌‌​‌‌​​‌‌‌‌⁠‌‌‍​‌⁠‌‍‌‍​‌​‍​‍‌⁠⁠‌​

Use ‘Suspend/Hold’ to park changes; quick ‘one sec’ line helps — what POS?

‌⁠‍⁠​‍​‍‌⁠‌​​‍​‍​⁠‍‍​‍​‍‌‍‌⁠‌‍‌‍‌⁠​⁠‌‍‍‍​‍​‍​‍⁠​​‍​‍‌‍‍⁠​‍​‍​⁠‍‍​‍​‍‌⁠​‍‌‍‌‌‌⁠​​‌‍⁠​‌⁠‍‌​‍​‍​‍⁠​​‍​‍‌‍‍‌‌‍‌​​‍​‍​⁠‍‍​⁠​‌​⁠‌‌​⁠‌‍​⁠​⁠​⁠‍​​‍⁠​​‍​‍‌‍‌​​‍​‍​⁠‍‍​‍​‍​⁠​‍​⁠​​​⁠​‍​⁠‌‌​⁠​‌​⁠​‌​⁠​​​⁠‍‌​‍​‍​‍⁠​​‍​‍‌‍‍​​‍​‍​⁠‍‍​‍​‍‌⁠‌‍‌‌‌​‌‌​​‌‌​‍​⁠‍‌​⁠​​‌⁠‌‌‌‍​⁠‌‍‍‌‌⁠​‍‌⁠‌⁠‌​‍​‌⁠​‌​‍⁠‌​⁠​‍‌⁠‍‍​‍​‍‌⁠⁠‌​​