Care should be taken that singers, too, can receive Communion with ease.
87. In the dioceses of the United States of America there are four options for the Communion chant: (1) the antiphon from The Roman Missal or the Psalm from the Roman Gradual as set to music there or in another musical setting; (2) the seasonal antiphon and Psalm of the Simple Gradual; (3) a song from another collection of psalms and antiphons, approved by the United States Conference of Catholic Bishops or the diocesan Bishop, including psalms arranged in responsorial or metrical forms; (4) a suitable liturgical song chosen in accordance with no. 86. This is sung either by the choir alone or by the choir or cantor with the people.
If there is no singing, however, the Communion antiphon found in the Missal may be recited either by the faithful, or by some of them, or by a lector. Otherwise, the priest himself says it after he has received Communion and before he distributes Communion to the faithful.
88. When the distribution of Communion is finished, as circumstances suggest, the priest and faithful spend some time praying privately. If desired, a psalm or other canticle of praise or a hymn may also be sung by the entire congregation.
89. To bring to completion the prayer of the People of God, and also to conclude the entire Communion Rite, the priest says the Prayer after Communion, in which he prays for the fruits of the mystery just celebrated.
In the Mass only one prayer after Communion is said, which ends with a shorter conclusion; that is,
If the prayer is directed to the Father: Per Christum Dominum nostrum (Through Christ our Lord);
If it is directed to the Father, but the Son is mentioned at the end: Qui vivit et regnat in saecula saeculorum (Who lives and reigns forever and ever);
If it is directed to the Son: Qui vivis et regnas in saecula saeculorum (You live and reign forever and ever).
The people make the prayer their own by the acclamation, Amen.
D. The Concluding Rites
90. The concluding rites consist of
Brief announcements, if they are necessary;
The priest's greeting and blessing, which on certain days and occasions is enriched and expressed in the prayer over the People or another more solemn formula;
The dismissal of the people by the deacon or the priest, so that each may go out to do good works, praising and blessing God;
The kissing of the altar by the priest and the deacon, followed by a profound bow to the altar by the priest, the deacon, and the other ministers.
From: GENERAL INSTRUCTION OF THE ROMAN MISSAL