Adding text and raised lettering to printable parts

Slicer or CAD: pick the stage where you add lettering

The PrusaSlicer Text tool can add labels, notes, signs, and serial or version numbers to an imported model. The cited documentation says text can follow planar or curved surfaces and its entities remain editable in a saved project. That describes the slicer project; it does not mean the source STL file is changed or that text remains an editable object after export.

The Emboss feature in Fusion, according to the Autodesk help, works earlier, during design. It embosses or debosses a solid body using sketch profiles, which includes text as long as the font is not a single line font. In a parametric design the feature keeps its link to the original sketch, so editing the sketch updates the relief automatically.

The choice may also depend on which working file you want to keep: the Prusa page documents editable text entities in a saved project, while Fusion help describes a sketch-linked feature in the parametric Timeline. If you work with a third-party model, check the applicable rights separately; the technical ability to add text does not settle permission.

Creating and positioning text in PrusaSlicer

The Prusa documentation describes two entry points. To add text to an existing model, select the object and press the T key, or right-click the model and choose Add part, then Text. For a standalone text object with no connection to other objects, right-click the platter and choose Add shape, then Text. That second route suits a name plate printed on its own.

You position the text by dragging it around the object. While dragging on the model, a white marker shows the point where the surface normal is calculated, which helps you seat the relief square to the area you are aiming at. You also get rotation around the Z axis, labeled Z-rot, and vertical elevation, labeled Z-move, to fine-tune placement without redoing everything with the mouse.

Fonts are imported automatically from your computer's font library, and any TrueType font should work. If you install a new font, close and reopen the Text tool and PrusaSlicer loads it without a restart. Keep in mind that technical support for a font does not grant you a license to use it on a product you sell; check the font license separately.

Emboss, deboss or modify: three different outcomes

In the Text tool context menu, the Prusa documentation lists three types. Added creates a new part and embosses the text, so material is added above the surface. Subtracted creates a negative volume that debosses the text, so the letters are cut into the part. Modifier creates a modifier, meaning a region that changes print settings inside the letter shapes without necessarily producing any raised geometry.

Prusa’s documentation gives Fuzzy skin as an example of a setting applied by Modifier text. This mode concerns print settings within the letter shapes; it does not necessarily create raised geometry. Choose Added or Subtracted when you want the tool to add or subtract geometry as described in the menu, then inspect the result in your project.

The text type can be changed later through Change type in the Text object’s context menu. This switches among the documented Added, Subtracted, and Modifier behaviors; it does not guarantee that the new object will print or read legibly. Check the preview again after changing it.

Wrapping text on curved surfaces and the angle limit

To make text follow a cylinder or a curve, the Prusa documentation says to expand the advanced text menu and enable Use surface. The text then curves along the surface beneath it. This suits a number on a round handle or an inscription around a vase.

The Prusa page gives a 90-degree limit for Use surface and says text becomes increasingly deformed as it approaches that angle. This value describes the tool in a page tagged PrusaSlicer 2.9 (Legacy); do not treat it as a universal printing limit or a limit for another projection method. Legibility needs checking for your model.

Fusion help says Emboss can wrap text around a solid body if the font is not single-line. In PrusaSlicer, the sliced preview lets you inspect the paths generated for your project; it does not by itself guarantee the finished part will be legible. Review areas where curvature changes the text shape before exporting.

Checking thickness and legibility before you export

The two pages set no minimum letter height or width that guarantees legibility. Inspect the sliced preview and the paths generated for your chosen text, then make a suitable test if legibility matters. A single path or a stroke absent from the preview calls for a check, but does not define a universal rule for every nozzle, font, or material. See the page on small features not printing as well.

Text presets, described in the Prusa documentation, store the font, text height, depth and all advanced settings. They exist to keep a consistent style for version numbers and similar labels from one part to the next. Once a font and size combination has produced a crisp letter on a test coupon you printed yourself, save it as a preset instead of typing it again.

For that coupon, choose a simple, quick geometry, for example a small flat tag carrying the same text embossed and debossed. The coupon's dimensions are yours to set for your nozzle and material; they are not validated here. Compare the printed result with the preview and adjust font, size or depth.

Keeping the project editable and exporting cleanly

According to the Prusa documentation, text entities remain fully editable even after re-opening a saved project file. That applies to the slicer project, not to an exported STL: once the mesh is written out, the text is frozen geometry. Always keep the project, and read the page on STL vs 3MF to understand what each format carries.

In Fusion, Autodesk help says the Emboss feature is added to the Timeline. In a parametric design it remains linked to its sketch, so sketch edits update the relief. Two controls round out the tool. Unchecking Tangent Chain stops the tool from automatically selecting tangentially connected geometry. The Flip Normal icon flips the normal side of the selected sketch profiles. These are tool controls, not a recipe for repairing a broken mesh.

If you change the depth value from positive to negative, the Effect switches automatically from Emboss to Deboss, and the reverse. Check the direction of the relief in the dialog before clicking OK, then export to the slicer and look at the preview one last time.

Sources and limits

• Text tool — Prusa Knowledge Base
• Emboss a solid body

We organize manufacturer and community documentation; we have not measured these products ourselves. The manual for your exact model takes precedence over general guidance.