Practical drawing review
Check the file.
Understand the result.
Choose the right source, check units and revisions, and know when to return to the original authoring tool.
STEP vs STP vs STL: file differences and viewer units
Choose a STEP, STP or STL file for review. Check CAD geometry versus meshes, millimetres versus coordinate units, missing parts and browser preview limits before drawing conclusions.
Read the guide →PCB fabrication reviewGerber ZIP viewer: checking layer and drill alignment
Separate copper, outline and Excellon drill files in a PCB ZIP. Check units, origin, mirroring and missing layers, with browser limits and source-CAM fabrication checks explained.
Read the guide →PDF drawing reviewPDF drawing viewer: text search and revision review checklist
Distinguish scanned and text PDFs, verify drawing numbers, revisions, pages and scale, and record a review with clear limits for text search, annotations and visual comparison.
Read the guide →Drawing registration · Excel and revisionsDrawing revision register: an Excel and REV review checklist
Connect source drawings, identifiers, revision registers, spreadsheet change proposals and approval checks. Try synthetic registration scenarios for revision mismatch and preserved previous revisions.
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