PrusaSlicer 2.9.x Legacy documentation: order, assembly envelopes and sequential-printing warnings

Enable the mode and read the list order

The Prusa Knowledge Base (KB) places the switch under Print settings → Output options → Complete individual objects; the option is unavailable in Simple mode. After enabling it, Arrange or the A key rearranges objects. From 2.9.1, arrangement also calculates order: review the result nonetheless.

Read the list from top to bottom. This means the order of entries in the interface, not the physical height of the objects. Drag entries to change order and press E in the 3D view to display numbers on objects. The list does not establish a universal rule about shorter parts or the front of the bed.

1. Compare the numbers in the view with the list. After every change, review arrangement and order, then repeat slicing and inspection.

Look beyond footprints on the bed

The moving assembly occupies space around the nozzle; model footprints alone do not describe the envelope to consider. Detailed geometries are documented for supported Prusa printers. Without those data, checking falls back to a simplified generic model based on extruder_clearance_radius and extruder_clearance_height. That fallback is not equivalent to detailed geometry. Do not infer detailed geometry from the brand: check data and documentation for your profile/version. If these cannot be established, treat the review as insufficient: as an editorial precaution, do not proceed with the sequential job; choose one object or ordinary printing.

Distinguish three things: object height, the moving assembly’s envelope and movement between objects. After finishing an object, the head travels back towards lower heights and may encounter previously completed objects. Clearance height is not equated with Z-hop here. No numerical clearance can be transferred from this diagram to a machine.

1. The diagram separates list, envelope and transition. Use its three views as reminders of what to inspect, rather than an arrangement to copy.

Stop preparation when warnings remain

From 2.9.1, the KB documents a preview of the extruder model for Prusa using the horizontal slider. In the gear at the bottom right of the plater, “Sequential slider applied only to top layer” limits the view to the top layer when checked; unchecking it shows the entire project. Preview assists inspection but does not certify freedom from collisions.

A warning can identify the affected object without preventing G-code export. Being able to export certifies nothing about the arrangement. If a warning or doubt remains, stop preparing the sequential job. Do not arbitrarily reduce limits to make a message disappear.

1. After a change, recheck arrangement and order, repeat slicing and inspect the preview again. If doubt remains, choose a single object or ordinary printing.

Adhesion and the limits of this review

The KB requires regular adhesion checks: each object may fail to stick to the bed. A sequence does not remove that check. Cooling-related slowdowns may also increase printing time, so do not assume an automatic time saving.

This guide does not transfer to the 3.0.0-alpha12 discussed in issue 15882. On 25 September 2026, the maintainer confirmed that sequential arrangement and collision detection were not implemented in the then-current alpha. Closure followed conversion to a discussion, rather than a fix. We draw no conclusion about every 3.x release.

We have performed no physical tests. The linked sources document software; they do not establish universal hardware compatibility or complete coverage of machine routines. Keeping the project and preferring prudent alternatives are editorial choices.