If you're working with 3D models in Blender, you may find yourself needing to reposition or move models within an OBJ scene. Fortunately, manipulating and moving models in Blender is a straightforward process. Follow these simple steps to move models within an OBJ scene in Blender:

1. Select the Model: In Blender, you can select a model by right-clicking on it in the 3D viewport. Once the model is selected, you can manipulate it using various tools.

2. Move Using the Transformation Gizmo: The transformation gizmo in Blender allows you to easily move, rotate, and scale models. After selecting the model, the gizmo will appear with axes for translation, rotation, and scaling. You can click and drag the arrows on the gizmo to move the model along a specific axis.

3. Use Keyboard Shortcuts: Blender offers keyboard shortcuts for moving models. Pressing 'G' will enable the grab tool, allowing you to move the selected model by dragging the mouse. You can then constrain the movement to a specific axis by pressing 'X', 'Y', or 'Z' after pressing 'G'.

4. Input Exact Coordinates: If you need to move a model to an exact position, you can input the coordinates in the sidebar. With the model selected, navigate to the 'Item' tab in the sidebar and input the desired X, Y, and Z coordinates.

5. Utilize Snapping Tools: Blender provides snapping tools that can help you move models with precision. You can enable snapping to grid, vertex, edge, or face, allowing you to align models accurately within the scene.

6. Parent Models: If you have multiple models in your scene, you can parent them to an empty object. This allows you to move and rotate multiple models simultaneously by manipulating the empty object.

By following these steps, you can effectively move models within an OBJ scene in Blender. Whether you need to reposition a single model or arrange an entire scene, Blender offers a variety of tools and techniques to make the process efficient and intuitive.