diff -r 121a40d5e34c -r 8e1c9f18ae15 src/ui/canvas.cpp
--- a/src/ui/canvas.cpp	Tue Jul 27 13:23:34 2021 +0300
+++ b/src/ui/canvas.cpp	Tue Jul 27 16:29:00 2021 +0300
@@ -21,6 +21,15 @@
 	this->update();
 }
 
+void Canvas::rebuildVertices(Document* document)
+{
+	if (this->vertexProgram.has_value())
+	{
+		this->vertexProgram->build(document);
+		this->update();
+	}
+}
+
 void Canvas::mouseMoveEvent(QMouseEvent* event)
 {
 	const ldraw::id_t id = this->pick(event->pos());
@@ -105,9 +114,12 @@
 	this->gridProgram->initialize();
 	this->axesProgram.emplace(this);
 	this->axesProgram->initialize();
+	this->vertexProgram.emplace(this);
+	this->vertexProgram->initialize();
 	for (AbstractBasicShaderProgram* program : {
 		static_cast<AbstractBasicShaderProgram*>(&*this->gridProgram),
 		static_cast<AbstractBasicShaderProgram*>(&*this->axesProgram),
+		static_cast<AbstractBasicShaderProgram*>(&*this->vertexProgram),
 	})
 	{
 		connect(this, &PartRenderer::projectionMatrixChanged,
@@ -156,6 +168,14 @@
 			this->gridProgram->draw();
 			glDisable(GL_BLEND);
 		}
+		// Render vertices
+		{
+			glLineWidth(2);
+			glEnable(GL_LINE_SMOOTH);
+			glHint(GL_LINE_SMOOTH_HINT, GL_NICEST);
+			this->vertexProgram->draw();
+			glDisable(GL_LINE_SMOOTH);
+		}
 		if (this->worldPosition.has_value())
 		{
 			QPainter painter{this};