https://daviddas.com -- If you'd like to create an entire lead sheet in Steinberg's Dorico, this video will walk you through it step by step. I've created a faux song which utilizes every technique I can think of that is typically used in a lead sheet, and show you how to create the finished sheet music.
Creating a lead sheet in Dorico is a sequence of dozens of steps. This video has been extensively chapterized, so you can refer to it later and jump to the specific technique you need:
0:00 Introduction
0:26 Starting from the template
0:48 Set up key and time signatures
1:09 Create simple slash notation
1:26 Add chords
1:45 Slash voices (more customized rhythmic notation)
2:37 A single repeat bar
3:39 Adding a metronome marking
4:13 Add a double bar
4:22 Enter a melody
4:36 Turn off a slash voice
4:56 Add lyrics
5:05 Using the lock tool
5:36 Creating a double bar repeat
5:55 Inserting cue notes
6:03 Lengthen or shorten note durations
6:44 Add slurs
7:13 Add additional text
7:57 Write mode vs. Engrave mode
8:14 Altering the positioning of score elements
8:29 Adding a key change
9:11 Adding repeats
10:35 Removing redundant elements
10:53 How to add bars
11:05 Shortening a region
11:55 Deleting measures
12:20 Adding title, composer, and header elements
14:23 Final proofreading
14:28 Removing superfluous rests
14:49 Manually correcting collisions
15:03 Manually creating system breaks
15:42 Preview the score using Print mode
15:55 Adjust the size of the metronome marking
16:12 Adjust the overall size of the staves and notes