> ## Documentation Index > Fetch the complete documentation index at: https://docs.altoura.com/llms.txt > Use this file to discover all available pages before exploring further. # Default 3D Models > Browse and add models from the built-in 3D model catalogue directly on the HoloLens, without opening the Procedures Portal. ## Overview The **Default 3D Models** catalogue lets you add ready-made 3D models to a procedure step directly from the HoloLens, while authoring. Previously, all 3D models had to be uploaded and attached to a step from the **Procedures Portal** before they could appear on the device. With the default catalogue, a curated library of models (arrows, generic tools, hands, and other common assets) is now available on the HMD itself, so you can build out a step without leaving Author mode. Author-mode procedure view showing the Media panel, main step panel, and an empty 3D Model panel on the right. Models added from the HMD stay in sync with the same procedure in the Procedures Portal, and vice versa. *** ## When to Use This Feature Use the default 3D model catalogue in Author mode to: * Add commonly used models (arrows, markers, tools, hand poses) to a step on the fly * Fill empty 3D Model panel slots without switching to the Procedures Portal * Iterate on step content directly in the physical environment * Keep the authoring flow inside the HMD when the model you need already exists in the catalogue *** ## Open the Catalogue from an Empty Slot When a step opens with no 3D models attached, the **3D Model** panel displays a grid of empty slots, each marked with a **+** (plus) icon. The 3D Model panel with eight empty slots, each showing a plus icon. ### Step-by-Step Instructions 1. Look at the **3D Model** panel for the current step. 2. Identify an empty slot (marked with a **+** icon). 3. Focus the **+** tile — the tile is highlighted while it is in focus. A plus tile in the 3D Model panel is highlighted, indicating it is in focus and ready to be selected. 4. Air-tap the tile, or say **"Select"** while gazing at it. ### What Happens Next The default 3D model catalogue opens in place of the empty grid, ready for you to browse. *** ## Browse the Catalogue Default 3D Model catalogue open with the Arrows group expanded, showing eight arrow tiles including Acute, Full Circle, Half Circle, and Insert. When the catalogue opens: * Models are organised into collapsible **groups** — for example, **Arrows**, **Generic Tools**, and **Hands**. * The first group (**Arrows**) is expanded by default. * Each tile shows a preview icon and the model name (for example, **Acute**, **Full Circle**, **Half Circle**, **Insert**). * A **Close** button appears in the top-right corner of the catalogue. Focus a tile to see the **"Say 'select'"** voice hint appear beneath it, indicating you can select it by voice or by air-tap. *** ## Scroll Through a Group If a group contains more models than fit on screen, use the **scroll buttons** on the right side of the catalogue to page through the group. ### Step-by-Step Instructions 1. Focus the **down chevron (˅)** at the bottom of the catalogue and select it to scroll to the next page of models within the current group. The down chevron scroll button at the bottom-right of the catalogue is highlighted, indicating it is in focus. 2. Focus the **up chevron (˄)** at the top of the catalogue and select it to return to the previous page. The up chevron scroll button at the top-right of the catalogue is highlighted, indicating it is in focus. ### What Happens Next The catalogue advances one page at a time so you can review all available models in the group without leaving the catalogue view. *** ## Collapse and Expand Groups You can collapse and expand groups to jump between categories without scrolling through everything. ### Collapse a Group Focus the **caret (˅)** next to an expanded group name and select it to hide that group's tiles. Once collapsed, only the group headers remain visible so you can see all available categories at a glance. The catalogue with all groups collapsed, showing only the Arrows, Generic Tools, and Hands headers stacked in the panel. ### Expand a Group Focus the **caret (˃)** next to a collapsed group name and select it to open that group's tiles. The Generic Tools group header in a collapsed state, with the caret next to it in focus and ready to be selected to expand the group. The group expands and its tiles appear below the header. For example, expanding **Generic Tools** shows models such as **Bolt**, **Drill**, **Nut**, and **Screwdriver**: The Generic Tools group expanded, showing tool tiles such as Bolt, Drill, Nut, and Screwdriver below the header. *** ## Close the Catalogue The Close button in the top-right corner of the catalogue is highlighted, indicating it is in focus. If you do not want to add a model right now, you can dismiss the catalogue and return to the standard 3D Model panel view. ### Step-by-Step Instructions 1. Focus the **X Close** button in the top-right corner of the catalogue. 2. Air-tap it, or say **"Select"**. ### What Happens Next The catalogue closes without adding any model. The 3D Model panel returns to its previous state, and any empty slots remain available for later. *** ## Add a Model to the 3D Model Panel Once you have found the model you want, add it to the current step in a single action. An arrow tile in focus inside the catalogue, showing the 'Say select' voice hint beneath it. ### Step-by-Step Instructions 1. Focus the model tile you want to add (for example, **Acute**). 2. Air-tap the tile, or say **"Select"** when the voice hint appears. ### What Happens Next * The catalogue closes automatically. * The selected model is added as a new tile in the **3D Model** panel for the current step. * The tile becomes available to place in the physical space, just like any model attached from the Procedures Portal. The selected model now appears as a tile in the 3D Model panel, back in the standard procedure view. *** ## Place the Model in the Physical Space After a model has been added to the 3D Model panel, you can spawn it in front of you to author its position, rotation, and behaviour. ### Step-by-Step Instructions 1. In the **3D Model** panel, select the tile of the model you just added. ### What Happens Next The model spawns in the physical environment in front of you, anchored relative to the QR position for the step. The model tile is in the 3D Model panel and the model itself has spawned in the physical space in front of the author. Select the spawned model to activate its edit handle, which lets you reposition, rotate, and resize it in space. The spawned model surrounded by a bounding box with edit handles, ready to be repositioned, rotated, or resized. You can then continue authoring the model — repositioning, resizing, rotating, and configuring animation or interactability. See [3D Model Authoring in Author Mode](/frontline/procedures/author/3d-model-authoring) for the full set of editing controls. *** ## Sync with the Procedures Portal Models added from the default catalogue on the HMD are stored against the same procedure as the one you would edit in the **Procedures Portal**. The two experiences stay in sync: * Models added on the HoloLens appear on the same step in the Procedures Portal. * Models removed from the Procedures Portal are removed from the step on the HoloLens. * The same is true in reverse — any change on either side propagates to the other. Sync is not always instant in an active session. To make sure you are seeing the latest step content: * On the **HoloLens**, tap the **Procedures** button in the side menu to fetch the latest changes. * In the **Procedures Portal**, refresh the browser tab. *** ## Notes & Limitations * The default catalogue provides a curated set of common models. Custom `.glb` models still need to be uploaded via the **Procedures Portal**. * Empty slots in the 3D Model panel are the only entry point for the catalogue. If the panel is full, remove a model first to expose a **+** slot. * Voice command **"Select"** works on any focused tile, scroll button, group caret, or the **Close** button.