Power Apps Design Best Practices Every Builder Should Know

Anyone can drag controls onto a canvas and call it an app. Building a Power App that stays fast, stays maintainable, and is pleasant to use a year after you ship it is a different skill entirely. The difference almost always comes down to design decisions you make early — how you structure forms, how you lay out screens, how you load data, and when you stop reinventing the wheel.

Below is a practical rundown of the design practices that matter most, drawn from Microsoft’s official guidance and shaped by what actually bites you in real-world projects.

Start with modern controls

If you’re still building with the classic control set, it’s worth switching your default to the modern controls. They’re built on Microsoft’s Fluent design language, which means they look current out of the box, respond to a centralized theme, and handle accessibility far better than hand-styled classic controls ever did.

The practical payoff is consistency. When your controls inherit from a theme, changing your brand color or font is one adjustment instead of a tedious pass through every screen. You also get UI elements — things like tab lists, progress bars, spinners, and info buttons — that would otherwise take real effort to fake with classic controls. A few of these are still in preview, so check the status of any specific control before you commit it to a production app, but the direction of travel is clear: modern is where Power Apps is going.

Design forms that don’t fight you

Forms are where most apps live and die. A few habits keep them clean:

Group related fields and keep it to one screen when you can. Break a form into logical sections so it reads top to bottom without making the user hunt. If a form is genuinely long, split it across steps, tabs, or screens rather than forcing an endless scroll.

Write labels like a human. Plain language beats internal jargon. If a field is required, say so, and validate formats — email, phone, dates — at the point of entry rather than discovering bad data later.

Reuse one form for create, edit, and view. This is the big one. Instead of building three separate forms, use a single form and switch its mode dynamically:

• FormMode.New when the user is adding a record
• FormMode.Edit when they’re changing an existing one
• FormMode.View when they’re just looking

One form means one place to maintain, and the experience stays consistent no matter how the user arrived. Pair it with formulas that drive the mode based on what the user clicked, and you’ve eliminated a whole category of duplicated work.

Keep distinct controls on distinct screens. A gallery, a display form, and an edit form each deserve their own space. Crowding them onto one screen makes the app harder to reason about — for you and for the user.

Use containers, not groups, for layout

When an app grows, you accumulate controls fast, and the instinct is to group them. Resist it. Groups feel convenient, but they have two real problems: screen readers don’t recognize them, so they contribute nothing to accessibility, and you can’t nest them, which makes any non-trivial layout painful.

Containers solve both. A container is a real control with its own properties — width, border, fill, and so on — and it positions its children relative to itself. Because containers are part of the app’s logical structure, assistive technology understands them, which means your layout choices double as accessibility wins. And because you can nest containers, you can build genuinely responsive, complex layouts that hold together when the screen size changes.

One rule of thumb: only put logically related controls in the same container. A container should represent a section of your UI, not a random bag of controls.

Galleries: where your app’s performance is won or lost

Galleries are deceptively dangerous. They look simple, but they’re the most common source of sluggish apps and weird bugs. Keep these in mind:

Don’t change a gallery’s Items from inside the gallery. Modifying the Items property from a child control’s OnSelect or OnChange is asking for trouble — it can trigger unpredictable re-renders and cascading events.

Watch out for controls that fire OnChange on their own. Combo boxes, date pickers, sliders, and toggles can fire change events when their bound value updates, not just when a user touches them. Inside a gallery, that can spiral into an infinite loop. If you hit one, switch to a modern control or one that doesn’t fire OnChange on data changes to break the cycle.

Be deliberate about patching large galleries. Patching many rows is slow, and updates can force the gallery to reload everything. For bulk operations, think about whether you really need to touch every row, and test with realistic data volumes.

Avoid nesting galleries. Nested galleries are a performance and data-binding headache. Almost always, there’s a better data shape or a function-based approach that avoids the nesting entirely.

Use flexible-height galleries for dynamic data. Fixed heights clip content. Setting Height to Parent.Height or another dynamic value lets the gallery grow to fit what it’s showing.

Load only the columns you need. Pulling an entire dataset into a gallery when you only display two fields is wasted bandwidth and memory. Trim it with ShowColumns:

// Only bring in the fields the gallery actually shows
Gallery_Tickets.Items =
    ShowColumns(
        colSupportTickets,
        "TicketID",
        "Subject",
        "Status"
    )

This keeps the gallery lean and noticeably more responsive, especially over a slow connection or with a large source.

Know when to build a reusable component (PCF)

Most of the time, the built-in controls are enough — and you should prefer them. But there’s a point where you keep rebuilding the same thing, or you need something the standard controls simply can’t do. That’s when the Power Apps Component Framework (PCF) earns its place.

Reach for a PCF component when you need:

• A complex or custom UI element that doesn’t exist in the standard control set
• Behavior or business logic beyond what standard Power Fx formulas handle cleanly
• A consistent piece of functionality reused across many apps or environments — build it once, drop it in everywhere
• A richer, more interactive experience than default controls allow

The key word is reuse. If you’ll only ever use it once and a standard control gets you 90% there, skip the overhead. If you’ll use it ten times across your tenant, building it properly once pays off fast.

Quick checklist

Before you ship, run through this:

• [ ] Default to modern, theme-aware controls
• [ ] One form handling New / Edit / View via dynamic form mode
• [ ] Required fields marked and inputs validated
• [ ] Layout built with nested containers, not groups
• [ ] No gallery Items changes from child controls
• [ ] No nested galleries
• [ ] Flexible-height galleries for dynamic data
• [ ] ShowColumns used to load only needed fields
• [ ] PCF reserved for genuinely reusable or custom needs

This article summarizes and builds on Microsoft’s official Power Apps app design guidelines. For the source documentation and the latest control availability, refer to Microsoft Learn.