How to Print Explored Rooms as Separate Fog-of-War Map Pieces

Decide whether a reveal means a whole room, a room plus its visible doorway, or only the portion characters can currently see. Separate room pages suit a dungeon where entering a space reveals its layout; they are less suitable when sight lines or movement through a long corridor need to be shown gradually. Tabletop GMs use several approaches, including separate map tiles, progressive drawing, and covering a complete map. The choice depends on what spatial information the game needs players to see. Role-playing Games Stack Exchange: “How best to progressively reveal the layout of a location to players?”

Make a private master map for your own reference, then give each player-facing piece a room code such as R1 or C1. The code lets you find the correct page without putting secret labels, hidden passages, or future rooms on the table. Keep the codes outside the map’s playable area, where they can be trimmed away or folded under.

Pick the grid size that matches the miniatures and play surface. For a D&D-style map, one common convention is a 5-foot square; D&D Beyond describes maps split into 5-foot squares, while also noting that a grid is optional. D&D Beyond: “New Player’s Guide: How to Build Tactical Encounters like a Pro”

For example, at one inch per square, a 30-by-20-foot room occupies 6 by 4 inches because each side contains six and four 5-foot squares. Add a small blank border around the playable area for cutting, labels, or a door tab. This is an illustrative calculation; choose a different square size if your group uses another scale, then keep it unchanged across every piece.

In a drawing, slide, or page-layout program, make each room its own page or artboard. Set the grid to the chosen physical square size, and draw walls, doors, and any visible terrain on that grid. If you are using a map image rather than drawing from scratch, crop or position it so the grid still prints at the intended size. Export the pages together as a multipage PDF, with one map piece per PDF page.

Give every doorway a clear, consistent connection. A door centered on the north wall of one page should meet a door on the south wall of the next page at the same grid position. Add a short corridor piece when rooms do not connect directly. Put a small matching mark outside each doorway—such as a dot or letter—if it will help align pieces; remove it before play if players should not see it. This layout method is a practical inference from the need to assemble room pieces accurately, not a printer-specific feature.

Check that the room’s grid footprint plus its border fits within the printable area of your chosen paper. A 6-by-4-inch room with modest margins can fit on common letter or A4 paper, though the exact margin depends on the printer. Larger rooms can use larger paper, be divided into multiple adjoining pieces, or be printed as tiled pages. Avoid shrinking a single room just to make it fit if doing so would make its squares inconsistent with the rest of the map.

Adobe Acrobat’s Poster option splits one oversized PDF page across multiple sheets. Its controls include tile scale, overlap, cut marks, labels, and a live preview. That option is useful when a room itself is too large for one sheet, but it creates a multi-sheet assembly rather than a single piece. Adobe Acrobat: “Print large-sized documents as posters”

For ordinary room pages, print the PDF at Actual size or 100% when the page fits the paper. Acrobat defines Actual size as printing without scaling; Fit reduces or enlarges a page to fit the selected paper, so it can change the grid size. Adobe Acrobat: “Adjust page size for printing PDFs” Check the printer driver too: a separate fit-to-page setting can also alter the output.

Print one test page and measure a printed grid square with a ruler. If a one-inch square is smaller or larger, check the PDF scale, selected paper size, and printer scaling settings before printing the remaining pages. Leave enough unprinted margin around page edges: a printer’s nonprinting border may clip a wall or doorway placed too close to the edge. For tiled pages, use the preview and overlap or cut-mark options to confirm the split before printing; Adobe describes overlap as a way to line up neighboring sheets. Adobe Acrobat: “Print large-sized documents as posters”

Print the pages, check their room codes against your master map, and cut them apart if the paper layout includes multiple pieces on a sheet. Store them face down or in numbered envelopes so the next room does not become visible while players handle the current one. If the pieces need to stay together on the table, use a small removable tab or low-tack tape on the reverse; avoid covering the grid or doors.

Before play, arrange the reveal order for likely routes. Keep alternate branches separate rather than placing the entire dungeon beneath a cover: separate pieces let you reveal only the room the party has reached. If a character can see through an open doorway into another space, decide in advance whether your table reveals that room too. That visibility rule is a game choice, not something the print layout can determine.

Lay out a few connected pages away from the players. Confirm the grid squares match, adjoining doors line up, and the page labels identify the intended sequence. Check that no future room, secret notation, or master-map detail is visible from the player side. Keep a spare blank grid page nearby for an unexpected passage or a room that changes during play.

The reliable workflow is: choose the reveal unit, lock the scale, make one map page per piece, test-print at actual size, then sort the finished pages by room code. It keeps each reveal ready to place while preserving a consistent grid for movement and miniatures.

• “How best to progressively reveal the layout of a location to players?” — Role-playing Games Stack Exchange
• “New Player’s Guide: How to Build Tactical Encounters like a Pro” — D&D Beyond
• “Print large-sized documents as posters” — Adobe Acrobat
• “Adjust page size for printing PDFs” — Adobe Acrobat