| mark_size | rnd_cfn_coord | 0 | relative marker size
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| text_host_bbox | rnd_cfn_boolean | 0 | when moving a text object, the outline thin-draw should also include the bounding box
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| term_label_size | rnd_cfn_real | 0 | size of terminal labels, in pcb font scale (100 is for the normal size)
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| subc_layer_per_side | rnd_cfn_boolean | 0 | hide top or bottom placed subcircuit annotations if the view is showing the other side
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| invis_other_groups | rnd_cfn_boolean | 0 | render non-current group layers with the inivisble color
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| black_current_group | rnd_cfn_boolean | 0 | render all layers of the current group black, for maximum contrast
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| smart_labels | rnd_cfn_boolean | 0 | attempt to place terminal labels in a way they don't overlap (costs extra CPU cycles, may slow down on-screen rendering)
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| label_thickness | rnd_cfn_coord | 0 | font thickness for labels (e.g. terminal labels); thinnest possible is 1nm
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| render_script | rnd_cfn_string | 0 | instructs the core about layer order in rendering
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| layer_alpha | rnd_cfn_real | 0 | [hidlib] alpha value for layer drawing
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| drill_alpha | rnd_cfn_real | 0 | [hidlib] alpha value for drill drawing
|