Question: Is it finger or foot operated?
About the article "Archery", section "Release aids".

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The middle finger, long finger, or tall finger is the third digit of the human hand, located between the index finger and the ring finger.
It is usually the longest finger.
It is also called "the third finger", "digitus medius", "digitus tertius", or "digitus III" in anatomy.
In Western countries, extending the middle finger (either on its own, or along with the index finger in the United Kingdom) is an offensive and obscene gesture, widely recognized as a form of insult (colloquially known as "flipping the bird", "flipping someone off", or simply "giving the finger").
The middle finger is often used for finger snapping together with the thumb. 
The index finger, (also referred to as forefinger, pointer finger, trigger finger, digitus secundus, digitus II, and many other terms), is the first finger and the second digit of a human hand.
It is located between the first and third digits, between the thumb and the middle finger.
It is usually the most dextrous and sensitive finger of the hand, though not the longest – it is shorter than the middle finger, and may be shorter or longer than the ring finger – see digit ratio.
"Index finger" literally means "pointing finger", from the same Latin source as "indicate;" its anatomical names are either "index finger" or "second digit". 
A digit (lat.
"digitus", "finger"), when used as a unit of length, is usually a sixteenth of a foot or 3/4" (1.905 cm for the international inch).
The width of an adult human male finger tip is indeed about 2 centimetres.
In English this unit has mostly fallen out of use, as do others based on the human arm: finger (7/6 digit), palm (4 digits), hand (16/3 digits), shaftment (8 digits), span (12 digits), cubit (24 digits) and ell (60 digits).
It is in general equal to the foot-nail, although the term nail can also be used as 1/16 of yard and other units. 
A pair of scissors consists of two pivoted blades.
In lower-quality scissors the cutting edges are not particularly sharp; it is primarily the shearing action between the two blades that cuts the material.
In high-quality scissors the blades can be both extremely sharp, and tension sprung - to increase the cutting and shearing tension only at the exact point where the blades meet.
The hand movement (pushing with the thumb, pulling with the fingers in right handed use) can add to this tension.
An ideal example is in high-quality tailor's scissors or shears, which need to be able to perfectly cut (and not simply tear apart) delicate cloths such as chiffon and silk.
Children's scissors are usually not particularly sharp, and the tips of the blades are often blunted or 'rounded' for safety.
Mechanically, scissors are a first-class double-lever with the pivot acting as the fulcrum.
For cutting thick or heavy material, the mechanical advantage of a lever can be exploited by placing the material to be cut as close to the fulcrum as possible.
For example, if the applied force (at the handles) is twice as far away from the fulcrum as the cutting location (i.e., the point of contact between the blades), the force at the cutting location is twice that of the applied force at the handles.
Scissors cut material by applying a local shear stress at the cutting location which exceeds the material's shear strength.
Some scissors have an appendage, called a finger brace or finger tang, below the index finger hole for the middle finger to rest on to provide for better control and more power in precision cutting.
A finger tang can be found on many quality scissors (including inexpensive ones) and especially on scissors for cutting hair (see hair scissors pictured below).
In hair cutting, some claim the ring finger is inserted where some place their index finger, and the little finger rests on the finger tang.
For people who do not have the use of their hands, there are specially designed foot operated scissors.
Some quadriplegics can use a motorized mouth-operated style of scissor. 
Pipe organist Sandra Soderlund notes that because there is "no way to sustain the sound when the finger or foot leaves the key, music that is to be legato has to be carefully fingered and pedaled".
Organists use "finger substitution, finger and toe slides, and other tricks to accomplish this".
On the pipe organ, performers use a related technique with their feet when playing the pedal keyboard; for some passages, performers may replace one foot with another foot.
As with finger substition, the most difficult type of foot substitution is in cases where one foot replaces another foot which is holding a sustained note.
During the replacement, there is a risk of sounding unwanted notes or releasing the held note.
Foot substitution can be done without planning for slow-moving, simple pedal parts.
However, rapid or complex "pedal parts must be "choreographed" by the organist" and "carefully planned if they are to be successful".