The Reorder page lists what is at or below its reorder point today. Two controls on it look further out: Plan ahead pulls in items that will run low soon, and By week turns the list into a buy plan with a date on every line. Both read the same sales pace and lead times as the rest of the page.
Plan ahead
The Plan ahead dropdown widens the list to items that are not due yet but are on track to hit their reorder point within the next 14, 30, 60, or 90 days at their current sales pace. They join their supplier groups dimmed and unticked, with a "low" date under Available - planning context that never changes your totals until you tick a line in. Ticking one is how you add it to the order you are already placing, ahead of the supplier's lead time.
See your buy plan by week
Switch the toggle above the filters from By supplier to By week to see the same lines as a weekly buy plan: Order now first, then This week, Week of buckets out to your horizon, and a collapsed Later rollup. Each line lands in the week of its Order by date - the day it runs low minus the supplier's lead time. Stockroom uses the lead time saved on the supplier; with none set, it falls back to the average of your recent received orders, and otherwise to the default in Settings - the note under the date ("14d lead - default") always says which one was used.
Inside each week, items still group by supplier with their own Create draft PO button, so a week's ordering stays a couple of clicks. Chips at the top of a week show purchase orders already expected to arrive then - sometimes the reason you do not need to order at all.
Good to know
Planned items stay dimmed and unticked until you tick them, so Est. total never counts an order you have not decided to place. Creating the drafts works the same as on the main list - see Reorder: turn low stock into draft purchase orders.