jk, ITS NOT POSITION LINES, I just got it wrong
The sizing handles in Powerpoint appear much in the same way they do in all Microsoft products. They appear around an image inserted into the Powerpoint document when you click on the picture you want to re-size as a group of dotted lines.
A point on the horizon where parallel lines appear to meet is called the vanishing point.
leaders
Absorption lines in a photographic spectrum appear as dark lines where specific wavelengths of light are absorbed by elements in a celestial object. These lines indicate the presence of elements in the object's atmosphere and can be identified by comparing their positions with known spectral lines of elements on Earth.
The dark lines that appear in a spectrum of light from a star are called absorption lines. These lines are caused by the absorption of specific wavelengths of light by elements in the outer atmosphere of the star. Absorption lines help astronomers identify the chemical composition of stars and other celestial objects.
Object lines are dark, thick lines used to define an object.
Dark lines in an absorption spectrum are called absorption lines. These lines correspond to wavelengths of light that have been absorbed by specific elements or molecules in the sample being analyzed. They appear as dips or gaps in the spectrum where less light is detected.
A vertice is a point where two or more lines connect. If an object is a closed object, meaning that all the line's endpoints are connected to another line's endpoint without any openings, then the object has as many vertices as it does lines. A square has four lines so it has four places where lines meet, called vertices. So a square has four vertices.
apparent motion
Different thickness of lines denotes different things. Object lines are a specifice thickness (in relation to other lines on the same drawing) to visually identify 'objects'. Dimension lines are usually thinner, so as not to get confused with the lines that identify the object in question.
[object Object]
In technical drawing and drafting, the object line (or visible line) has precedence over all other types of lines. Object lines are the thickest and darkest lines used to represent the edges of an object, clearly defining its shape. Other lines, such as hidden lines, center lines, and dimension lines, are used to convey additional information but are less prominent than object lines.