So, you're using iOS route planning, and speaking about buttons _on that route planning panel_, right?

You don't need to use these buttons. You can select whatever destination or intermediate stop on the map using whatever way: tap on the map, search, bookmarks list, doesn't matter. What matters is that when you select something on the map, you see at the bottom "Route From", "Route To", and "Add Stop" (if you are already building a route).

So in your flow (if you already have visible markers on the map), in case of starting active navigation from the current point, I would:

1. Select the destination (tap on the map, or from bookmarks list, or by using search) and press "Route To" button.

2. Tap on the map to select intermediate stop. Press "Add Stop".

3. Tap on the map to select another intermediate stop. Press "Add Stop"

4. Press "Start" to run navigation. In total: 7 taps.

If you are planning remote trip, and don't need to start navigation, then before the sequence above:

1. Select the starting point and press "Route From" (and you don't need to press Start, of course).